E-Flora BC: Electronic Atlas of the Flora of British Columbia

Hedysarum sulphurescens Rydb.
yellow hedysarum (sulphur hedysarum; sulphur sweet-vetch; white sweetvetch; yellow sweet-vetch)
Fabaceae (Pea family)

Introduction to Vascular Plants

© Virginia Skilton  Email the photographer   (Photo ID #2574)

E-Flora BC Static Map
Distribution of Hedysarum sulphurescens
Click here to view the full interactive map and legend
Details about map content are available here
Click on the map dots to view record details.

Species Information

Click on the image below to view an expanded illustration for this species.



General:
Perennial herb from a thick stem-base and taproot; stems several, erect to spreading, 20-60 cm tall, usually branched above, sparsely short-stiff-hairy, greenish, shallowly grooved.
Leaves:
Alternate, odd-pinnate, sparsely hairy below, glabrous but minutely glandular above, stalked, 8-20 cm long; leaflets 9 to 17, elliptic to egg-shaped, conspicuously veined, abruptly sharp-pointed at the tip, 15-30 mm long, 5-10 mm wide; stipules brown, membranous, joined or free, 10-15 mm long.
Flowers:
Inflorescence an axillary raceme of 20 to 100 pea-like, nodding flowers; corollas yellow to whitish, 14-18 mm long, the wing-lobes slender and nearly equalling the claw; calyces 3-4 mm long, the teeth shorter than the tube, the upper pair of teeth wider and shorter than the lower three.
Fruits:
Pods, constricted between the seeds into (1) 2 to 4 segments, the segments asymmetrically elliptic, 6-10 mm wide, irregularly net-veined, narrowly wing-margined.

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

Flower Colour:
White
Blooming Period:
Late Spring
Fruit/Seed characteristics:
Colour: Brown
Present over the Summer
Source:  The USDA

Habitat / Range

Mesic to dry glades and open forests in the steppe and montane zones; locally common in SE BC, infrequent in the Peace River region; E to SW AB and S to MT, WY and NC WA.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Hedysarum sulphurescens

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

Minimum

Average

Maximum

Elevation (metres) 600 1522 2682
Slope Gradient (%) 0 32 100
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
5 178 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 3 7
Modal Nutrient Regime
Class
C
Number of field plots
 species was recorded in:
458
Modal BEC Zone Class
MS
All BEC Zones (# of stations/zone) species was recorded in: AT(11), ESSF(125), ICH(12), IDF(86), IMA(7), MS(131), PP(10), SBS(2)

Climate

The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Taxonomic and Nomenclatural Links

Additional Photo Sources

Related Databases

General References