Salix exigua Nutt.
narrow-leaf willow (coyote willow; sandbar willow)
Salicaceae (Willow family)
Introduction to Vascular Plants
narrow-leaf willow (coyote willow; sandbar willow)
Salicaceae (Willow family)
Introduction to Vascular Plants
SUBTAXA PRESENT IN BC
Species Information
General:
Dioecious shrubs or trees, 0.5-6 m tall, forming colonies by root shoots, branches erect, flexible at base; twigs yellow- to red-brown, smooth or sparsely to densely hairy.
Leaves:
Alternate, simple, linear to strap-shaped, 3-16 cm long, 0.2-1 cm wide; lower surface glaucous or not, silky or long-soft hairy to nearly smooth, hairs white, upper surface shiny, silky or long soft-hairy to nearly smooth, margins entire or remotely and minutely spiny-toothed, bases wedge-shaped, tips pointed to tapered; leaf stalks without glandular dots at top; stipules leaflike, rudimentary or absent.
Flowers:
Unisexual, lacking sepals and petals, borne in catkins which flower as leaves emerge or throughout season, the catkins slender on leafy twigs, floral bracts pale, hairs wavy or straight, female bracts deciduous; stamens 2; ovaries 1, smooth or hairy; styles 0-0.2 mm long.
Fruits:
Capsules which split open to release the seeds, each of which is surrounded by a tuft of hairs; stalks 0.2-0.9 mm long.
USDA Species Characteristics
Flower Colour:
Yellow
Blooming Period:
Early Spring
Fruit/Seed characteristics:
Colour: White
Present from Summer to Spring
Source: The USDA
Ecology
Ecological Framework for Salix exigua
The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)
The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)
| Site Information |
Value / Class |
||
|
Avg |
Min |
Max |
|
| Elevation
(metres) |
560 | 55 | 1160 |
| Slope
Gradient (%) |
2 | 0 | 32 |
|
Aspect (degrees) |
314 | 45 | 360 |
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
5 | 2 | 8 |
| Modal
Nutrient Regime
Class |
D | ||
| #
of field plots species was recorded in: |
45 | ||
| Modal
BEC Zone Class |
BG | ||
|
All BEC Zones (# of stations/zone) species was recorded in |
BG(20), BWBS(10), CWH(1), IDF(7), PP(4), SBS(2) | ||
|
Source:
Klinkenberg 2013
|
|||
Habitat and Range
Pioneer on mesic to moist, sandy or gravelly floodplains and sedge meadows in the steppe and montane zones; common in SE and SC BC, less common northward; ssp. exigua - E to SK and NB, S to TX, NM, AZ and CA; ssp. interior - N to AK, YT and NT, E to NB and S to VA, MS, LA, OK and CO.Synonyms
Synonyms and Alternate Names:
Salix argophylla Nutt.
Salix exigua subsp. interior (Rowlee) Cronquist
Salix exigua var. angustissima (Anderss.) Reveal & Broome
Salix exigua var. columbiana Dorn
Salix exigua var. exterior (Fernald) C.F. Reed
Salix exigua var. hindsiana (Benth.) Dorn
Salix exigua var. luteosericea (Rydb.) Schneid.
Salix exigua var. nevadensis (S. Wats.) Schneid.
Salix exigua var. parishiana (Rowlee) Jepson
Salix exigua var. pedicellata (Andersson) Cronquist
Salix exigua var. sericans (Nees) Dorn
Salix exigua var. stenophylla (Rydb.) Schneid.
Salix exigua var. virens Rowlee
Salix fluviatilis var. argophylla (Nutt.) Sarg.
Salix fluviatilis var. sericans (Nees) B. Boivin
Salix hindsiana Benth.
Salix hindsiana var. leucodendroides (Rowlee) Ball
Salix hindsiana var. parishiana (Rowlee) Ball
Salix hindsiana var. tenuifolia (Anderss.) Anderss.
Salix interior var. angustissima (Anderss.) Dayton
Salix interior var. exterior Fernald
Salix interior var. luteosericea (Rydb.) Schneid.
Salix interior var. pedicellata (Andersson) C.R. Ball
Salix interior var. wheeleri Rowlee
Salix linearifolia Rydb.
Salix longifolia Muhl., non Lam.
Salix longifolia var. argophylla (Nutt.) Anderss.
Salix longifolia var. exigua (Nutt.) Bebb
Salix longifolia var. interior (Rowlee) M.E. Jones
Salix longifolia var. opaca Anderss.
Salix longifolia var. pedicellata Andersson
Salix longifolia var. sericans Nees
Salix longifolia var. wheeleri (Rowlee) C.K. Schneid.
Salix luteosericea Rydb.
Salix macrostachya var. leucodendroides Rowlee
Salix malacophylla Nutt. ex Ball
Salix nevadensis S. Wats.
Salix parishiana Rowlee
Salix rubra Richardson, non Huds.
Salix sessilifolia subsp. hindsiana (Benth.) Andersson
Salix sessilifolia var. hindsiana (Benth.) Anderss.
Salix sessilifolia var. leucodendroides (Rowlee) Schneid.
Salix stenophylla Rydb.
Salix thurberi Rowlee
Salix wheeleri (Rowlee) Rydb.