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Calflora |
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Salix at Jasper Ridge
prepared by John Rawlings
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Salix at Jasper Ridge prepared by John Rawlings |
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po147912 Salix exigua var. hindsiana John Rawlings, Sara Timby 2019-12-07
Location: Jasper Ridge Biological Preserve, Stanford University; south of Boat Launch (Searsville Lab Landing), SW lake margin Notes: dense clonal stand at SW lake margin; scattered individuals elsewhere |
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po188234 Salix exigua var. hindsiana John Rawlings, Diane Renshaw, Sara Timby 2021-05-01
Location: Jasper Ridge Biological Preserve, Stanford University; Rd E Notes: Rhizomatous thicket-forming or growing as small tree as component of willow canopy in freshwater marsh; vegetative and flowering (staminate) branches from the same tree; florets with 2 stamens. Field identification by leaf blade gestalt (see below >>>). Other characters examined when available: pistillate capsules hairy. "Variety hindsiana is difficult to separate morphologically from var. exigua . . . It can be distinguished from var. exigua by its soft, spreading hairs on branchlets and juvenile leaves" (FNA). >>> Leaf blade conspicuously silvery-green, similar on both sides, densely hairy to silky villous, especially on young leaves. Leaf shape narrow, linear or linear-lanceolate . . . S. exigua var. hindsiana |
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po198012 Salix exigua var. hindsiana John Rawlings, Diane Renshaw 2021-11-04
Location: Jasper Ridge Biological Preserve, Causeway, Trail 13, Corte Madrea Creek Delta area Notes: Extensive patch for 50m+ of tall, mature Sandbar Willow on the N. side of the causeway. |
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po194883 Salix exigua var. hindsiana John Rawlings, Ken Hickman 2021-09-01
Location: Jasper Ridge Biological Preserve; Corte Madera Creek Delta area Notes: Colonizing former lakebed, with large Arroyo, Pacific and Red willow |
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po198053 Salix exigua var. hindsiana Diane Renshaw 2021-11-06
Location: Jasper Ridge Biological Preserve, west side of Searsville Reservoir Notes: A linear stand of Sandbar Willow along the W side of Searsville Reservoir, on old imported sand brought in for a historical recreational beach. |
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po198054 Salix exigua var. hindsiana Diane Renshaw 2021-11-06
Location: Jasper Ridge Biological Preserve, west side of Searsville Reservoir Notes: Near the S. end of a linear stand of Sandbar Willow, growing on imported sand of a historical recreational beach |
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po201234 Salix exigua var. hindsiana John Rawlings, Sara Timby 2021-12-03
Location: Jasper Ridge Biological Preserve; Trail 14 X Road E Notes: pistillate individual just beginning to bloom; new leaves and old leaves on same branchlet |
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po198050 Salix exigua var. hindsiana Diane Renshaw 2021-11-06
Location: Jasper Ridge Biological Preserve, west side of Searsville Reservoir Notes: N end of a linear stand of Sandbar Willow, growing on imported sand of an historical recreational beach |
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po198051 Salix exigua var. hindsiana Diane Renshaw 2021-11-06
Location: Crowded plants in a linear stand of Sandbar Willow, growing on imported sand of a historical recreational beach. Jasper Ridge Biological Preserve. Notes: Jasper Ridge Biological Preserve, west side of Searsville Reservoir |
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po198052 Salix exigua var. hindsiana Diane Renshaw 2021-11-06
Location: Jasper Ridge Biological Preserve, west side of Searsville Reservoir Notes: A linear stand of Sandbar Willow along the W side of Searsville Reservoir, on old imported sand brought in for a historical recreational beach. |
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po198013 Salix exigua var. hindsiana John Rawlings, Diane Renshaw 2021-11-05
Location: Jasper Ridge Biological Preserve, Causeway, N side of Trail 13 Notes: Prominent patch of Sandbar Willows, 25-30 ft tall; in a patch of +/- 5-10 individual trees. These share the canopy with Arroyo and Pacific Willows. |
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po167600 Salix laevigata John Rawlings, Nona Chiariello, Herbarium Group 2020-10-07
Location: Jasper Ridge Biological Preserve, Stanford University; Searsville Lake north of boat dock Notes: Seedlings in lakebed; possibly representing more than one species; four willows ring the lake |
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po195743 Salix laevigata John Rawlings, Bill Gomez, Diane Renshaw 2021-09-20
Location: Jasper Ridge Biological Preserve, Stanford University; San Francisquito Creek Notes: common |
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po193101 Salix laevigata John Rawlings, Sara Timby 2021-06-28
Location: Jasper Ridge Biological Preserve, Stanford University; Trail 12. Notes: Large tree streamside; bud scale overlapped |
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po194881 Salix laevigata John Rawlings, Ken Hickam 2021-09-03
Location: Jasper Ridge Biological Preserve; Corte Madera Creek Delta area Notes: Developing woodland of primarily red willow saplings, its S edge about 25 m N of cattail/willow marsh edge |
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po194885 Salix laevigata John Rawlings, Ken Hickman 2021-09-01
Location: Jasper Ridge Biological Preserve; Corte Madera Creek Delta area Notes: bud scales overlapping; growing with Arroyo and Pacific willow |
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po192410 Salix laevigata John Rawlings, Sara Timby 2021-06-13
Location: Jasper Ridge Biological Preserve, Stanford U; S side of Trail 13. (mapped as willow #8) Notes: largish tree overarching trail; overlapping bud scale margins |
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po193445 Salix laevigata John Rawlings, Sara Timby 2021-07-01
Location: Jasper Ridge Biological Preserve, Stanford University; Searsville Lake north of boat dock Notes: Plant dug-up from Searsville Lake dry bed October 2020 and grown in a pot in garden; about 3 ft tall | |||||||||
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po192390 Salix laevigata John Rawlings, Sara Timby 2021-06-13
Location: Jasper Ridge Biological Preserve, Stanford U; N side of Trail 13 along Leonard's Bridge Notes: 1+ overstory tree, with Salix lasiandra lasiandra and Salix lasiolepis. Serrulate lf blade margin; overlapping bud scale w hairy margin. Mapped as tree #15 |
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po188230 Salix laevigata John Rawlings, Diane Renshaw, Sara Timby 2021-05-01
Location: Jasper Ridge Biological Preserve, Stanford University; Trail 13 (Mapped as willow #10.5) Notes: Staminate tree, component of willow canopy in freshwater marsh; co-dominant with Salix lasiandra and Salix lasiolepis. Field identification by leaf blade gestalt (glabrous, lanceolate to elliptical, apex acute, acuminate, sometimes with drip tip), margins usually finely serrate, and lack of spherical or wart-like glands on petiole below base of leaf blade; other characters examined when available: bud margins overlapping (not fused); stamens 3?7, filaments free or basally connate, anthers 0.4?0.6 mm. Mapped as willow 10.5 |
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po199757 Salix laevigata John Rawlings 2021-11-10
Location: Jasper Ridge Biological Preserve, Stanford U; Corte Madera Creek from pool at base of dam to Road C Notes: mapped as willow #60 |
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po192867 Salix laevigata John Rawlings, Sara Timby 2021-06-25
Location: Jasper Ridge Biological Preserve, Stanford University; Trail 14. Mapped as Red Willow #20 Notes: Two+ large trees forming dense copse, well developed buds |
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po197025 Salix laevigata John Rawlings, Ken Hickman, Nona Chiariello 2021-10-15
Location: Jasper Ridge Biological Preserve, Stanford U; Searsville Reservoir west side near dam Notes: 3 mature trees; developing buds with overlapping scales |
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po197730 Salix laevigata John Rawlings, Sara Timby 2021-10-25
Location: Jasper Ridge Biological Preserve, Stanford U; Searsville Reservoir west side near dam; mapped as willow #42 Notes: Single tree with multiple trunks or small patch; developing buds with overlapping bud scale |
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po192393 Salix laevigata John Rawlings, Sara Timby 2021-06-13
Location: Jasper Ridge Biological Preserve, Stanford U; N side of Trail 13 (willow #11) Notes: Largish tree arching over trail; green flagged. Serrulate lf blade margin; no petiole glands; conspicuous channeled petioles. Mapped as willow #11 |
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po192866 Salix laevigata D Renshaw, S Timby, J Rawlings, S Patel 2021-07-09
Location: Jasper Ridge Biological Preserve, Stanford University; Trail 14. Mapped as Willow #21, just north of Big Inlet Notes: Two+ large trees forming dense copse, well developed buds |
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po197360 Salix laevigata John Rawlings, Diane Reynolds 2021-10-19
Location: Jasper Ridge Biological Preserve, Stanford University; Trail 14 E side of Searsville Reservoir near dam, downslope. Mapped as Red Willow #41 Notes: Canopy reaching trail; a few trees; developing buds |
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po195589 Salix laevigata John Rawlings, Ken Hickman 2021-09-15
Location: Jasper Ridge Biological Preserve, Stanford U; Corte Madera Creek downstream from Searsville Dam, between Bear Creek confluence and Road C bridge Notes: Single sapling; other individuals along creek. Bud scale margins overlapping, overlap seam on adaxial bud face |
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po167219 Salix lasiandra var. lasiandra John Rawlings, Nona Chiariello, Herbarium Group 2020-10-07
Location: Jasper Ridge Biological Preserve, Stanford University; Searsville Lake north of boat dock Notes: Tricky because the bud scales are hairy all over - more so than i noticed on other trees - but the scale is fused and the stipule and petioles under magnification have significant glands (with unaided vision the glands are cryptic). Lesson is sometimes magnification is required to see diagnostic characters. Isolated tree, vegetative, at edge of reservoir. Red, Sandbar, and Arroyo willows also grow around the reservoir. |
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po192408 Salix lasiandra var. lasiandra John Rawlings, Sara Timby 2021-06-13
Location: Jasper Ridge Biological Preserve, Stanford U; N side of Trail 13 at wide section of Leonard's Bridge (Mapped as willow #14) Notes: Mapped as willow #14 |
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po193533 Salix lasiandra var. lasiandra John Rawlings, Sara Timby 2021-07-16
Location: Jasper Ridge Biological Preserve, Stanford University; Trail 12. Mapped as Willow #22 Notes: large tree; creekside of trail; bud scale margins fused, petiole glands obscure |
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po194884 Salix lasiandra var. lasiandra John Rawlings, Ken Hickman 2021-09-03
Location: Jasper Ridge Biological Preserve; Corte Madera Creek Delta area Notes: spherical glands, bud scales fused |
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po192413 Salix lasiandra var. lasiandra John Rawlings, Sara Timby 2021-06-13
Location: Jasper Ridge Biological Preserve, Stanford U; N side of Trail 13 from Causeway bridge Notes: Several trees, a few branches overhanging Causeway Bridge |
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po194340 Salix lasiandra var. lasiandra John Rawlings 2021-08-01
Location: Jasper Ridge Biological Preserve, Stanford U; N side of Trail 13 from bridge Notes: Group of 3+ trees, a few branches overhanging Causeway Bridge. Buds with fused margins; petioles with wart-like glands |
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po240530 Salix lasiandra var. lasiandra John Rawlings, Rebecca Reynolds, Diane Renshaw, Teal Derrer 2022-12-06
Location: Jasper Ridge Biological Preserve, Stanford University; upper lake area Notes: Locally common tree willow |
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po240813 Salix lasiandra var. lasiandra Diane Renshaw, John Rawlings, Teal Derrer, Rebecca Reynolds 2022-12-06
Location: Jasper Ridge Biological Preserve, Stanford University. Upper Lake, in riparian area btwn open water and cleared PG&E ROW. Notes: Riparian willow stand dominated by Salix lasiandra var. lasiandra, with Cornus sericea ssp. sericea in the understory. Willow ID confirmed by conspicuously warty petioles and fused bud scales. |
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po188227 Salix lasiandra var. lasiandra John Rawlings, Diane Renshaw, Sara Timby 2021-05-01
Location: Jasper Ridge Biological Preserve, Stanford University; Trail 13 (Mapped as willow 10.7) Notes: Co-dominant overstory tree of riparian willow woodland southwest of Searsville Lake, with Salix laevigata and Salix lasiolepis. Field identification by leaf gestalt and petiole glands: blades bifacial, i.e. dark to shiny green above, lighter below, typically lanceolate, acuminate, frequently with long drip tip, finely serrate margins; petiole tip with prominent spherical, wart-like, or leaf-like glands, sometimes visible at arm's-length, sometimes requiring magnification. Other characters examined when available: foliaceous stipules with both marginal glandular teeth and glands adaxially; glabrous capsules; staminate florets with 3-6 stamens, anthers 0.6-1mm, filaments free or connate (FNA). N.B. Individual leaves and all leaves on some branches may not may not express prominent spherical, wart-like, or leaf-like glands. Mapped as willow 10.7 |
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po193400 Salix lasiandra var. lasiandra D Renshaw, S Timby, J Rawlings, S Patel 2021-07-09
Location: Jasper Ridge Biological Preserve; S side of Trail 13 at Leonards Bridge (mapped as willow #15.3) Notes: Tall tree |
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po193401 Salix lasiandra var. lasiandra D Renshaw, S Timby, J Rawlings, S Patel 2021-07-09
Location: Jasper Ridge Biological Preserve; N side of Trail 13 at Leonards Bridge (mapped as willow #15.4 - about 33 yards west of east terminus of Leonards Bridge) Notes: Tree 60-70 ft tall; maturing flower buds |
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po196346 Salix lasiandra var. lasiandra John Rawlings, Ken Hickman 2021-09-29
Location: Jasper Ridge Biological Preserve; N side of Trail 13 at Leonards Bridge (mapped as willow #15.5 - about 30 yards west of east terminus of Leonards Bridge) Notes: bud scales fused |
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mu25836 Salix lasiandra var. lasiandra Teal Derrer, John Rawlings 2022-11-01
Location: Jasper Ridge Biological Preserve Notes: tall tree, vegetative, with Salix ladiolepis, S laevigata. Identified by leaf blade shape and fused bud scales |
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po197889 Salix lasiolepis Diane Renshaw, John Rawlings, Bill Gomez 2021-10-20
Location: Jasper Ridge Biological Preserve; San Francisquito Creek, dry creek bed Notes: New growth on this Arroyo Willow had prominent and distinctive stipules |
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po193532 Salix lasiolepis John Rawlings, Sara Timby 2021-07-16
Location: Jasper Ridge Biological Preserve, Stanford University; Trail 12. Mapped as Willow #19 Notes: Large tree streamside; leaf blades entire, enrolled; developing buds 4-5 mm long, margins fused | |||||||||
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po197849 Salix lasiolepis Diane Renshaw 2021-10-26
Location: Jasper Ridge Biological Preserve, willow riparian woodland Notes: There were many downed branches at this site due to a storm on 10/24/2021, including this Arroyo Willow with Willow-Apple-Gall Sawfly galls, Pontania californica. |
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po194882 Salix lasiolepis John Rawlings, Ken Hickman 2021-09-01
Location: Jasper Ridge Biological Preserve; Corte Madera Creek Delta area
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po192412 Salix lasiolepis John Rawlings, Sara Timby 2021-06-13
Location: Jasper Ridge Biological Preserve, Stanford University; Tr 13 Bridge, S side Trail 13, 1 meter E of bridge Notes: largish DBH; short silky hairs abaxial lf blade, entire and enrolled. Mapped as willow 6 |
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po195734 Salix lasiolepis John Rawlings, Ken Hickman 2021-09-15
Location: Jasper Ridge Biological Preserve, Stanford University; along PG&E right of way Notes: with Ribes divaricatum, Cornus sericea, Rubus ursinus, Typha |
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po198634 Salix lasiolepis John Rawlings, Diane Renshaw, Ken Hickman, Bill Gomez 2021-11-16
Location: Jasper Ridge Biological Preserve; Trail 10 Notes: with Poison oak, Garrya eliptica |
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po194539 Salix lasiolepis John Rawlings, Sara Timby 2021-07-09
Location: Jasper Ridge Biological Preserve, Stanford University; Road E, north of Trail 13 Notes: Small tree, atypical form with narrow leaf blade 1.0-1.5 cm wide; widespread. Pontania pacifica leaf galls present. Growing with Salix exigua var. hindsiana |
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po201238 Salix lasiolepis John Rawlings, Sara Timby 2021-12-04
Location: Jasper Ridge Biological Preserve; Trail 13 X Road E Notes: staminate tree, 2 stamens per floret |
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po192397 Salix lasiolepis John Rawlings, Sara Timby 2021-06-13
Location: Jasper Ridge Biological Preserve, Stanford U; S side of Trail 13 at ramp to Leonard's Bridge Notes: Entire inrolled leaf blade margin. Largest DBH observed on survey, Mapped as willow #13 |
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po188229 Salix lasiolepis John Rawlings, Diane Renshaw, Sara Timby 2021-05-01
Location: Jasper Ridge Biological Preserve, Stanford University Notes: Common and widespread shrub or small tree along creeks and in marshy areas, and taller trees in interior of the Willow woodland southwest of Searsville reservoir, where it is a component of the canopy with Red (S. laevigata) and Pacific willow (S. lasiandra), and scattered individuals and patches of Sandbar willow (S. exigua). Field identification by leaf gestalt: usually oblanceolate (widest between middle and leaf tip) with entire narrowly revolute margins, blades bifacial, i.e. dark to shiny green above, lighter below. Other characters examined when available: flowering before leafing out, pistillate capsules glabrous, staminate florets with two anthers, Pontania pacifica leaf galls. >>> Juvenile leaves can be short-silky abaxially for S. lasiolepis, which has suggested to some observers that such plants are Sitka willow (Salix sitchensis) because the two species have similar leaf shapes in our region. |
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po207952 Salix lasiolepis John Rawlings, Sara Timby 2021-12-16
Location: Jasper Ridge Biological Preserve, Corte Madera Creek; Trail 12 at edge of riparian corridor south of Trail 10 intersection Notes: Dominant shrubby willow at edge of riparian corridor; budding while retaining many past season leaves |
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po198633 Salix lasiolepis John Rawlings, Diane Renshaw, Ken Hickman, Bill Gomez 2021-11-16
Location: Jasper Ridge Biological Preserve; Nolan Creek (Westridge Fork of Corte Madera Creek) Notes: with Aesculus californicus, Dirca occidentalis, Juncus hesperius, Physocarpus capitatus, Toxicodendron diversilobum |
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mu14881 Salix lasiolepis John Rawlings, Diane Renshaw, Sara Timby 2021-04-15
Location: Jasper Ridge Biological Preserve, Mapache Fenceline Notes: fruiting; common, only willow observed; with Acer negundo |
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po255431 Salix sitchensis Teal Derrer, John Rawwlings 2023-10-20
Location: Jasper Ridge Biological Preserve, Stanford University; Low Flow Crossing San Francisquito Creek Notes: Just downstream of the bridge, at least one staminate tree, buried under some other fallen vegetation.. Flowering 2/2024 https://www.inaturalist.org/observations/199971824 |
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