614 FABACEAE 



1. Coronilla varia L. Coronilla, Axseed. Fig. 2921. 



Coronilla varia L. Sp. PI. 743. 1753. 



Perennial, the stems branching, straggling or ascending, glabrous, 3-6 dm. high. Leaves 

 sessile; leaflets 11-25, oblong to obovate, 1-2 cm. long, obtuse and mucronate ; peduncles longer 

 than the leaves ; flowers capitate, 8-12 mm. long, on slender pedicels ; standard pink, wings white, 

 keel purple-tipped; pod linear, 4-angled, the joints 6-8 mm. long. 



Native of Europe, sparingly naturalized in western Oregon, especially on ballast near Portland. June-July. 



22. HEDYSARUM L. Sp. PI. 745. 1753. 



Perennial herbs or some species shrubs, with odd-pinnate leaves, and persistent 

 stipules. Flowers showy in axillary pedunculate racemes. Calyx bracteolate, its teeth 

 subequal. Standard short-clawed, obovate to orbicular; wings oblong; keel obtuse, ex- 

 ceeding the other petals. Stamens diadelphous. Pod compressed, jointed, its joints orbicu- 

 lar or quadrate, approximate, readily separable. [Name Greek, meaning sweet-broom.] 



A genus of about 70 species, natives of the north temperate zone. Type species, Hedysarum coronarium L 



Flowers purple. 



Pods of 4—7 joints, strigose; calyx-lobes longer than the tube, subulate. 1. H. Mackenzie. 



Pods of 1-3 joints, glabrous; calyx-lobes shorter than the tube. 2. H. occidentale. 



Flowers yellow. 3. H. sulphurescens. 



1. Hedysarum Mackenzii Richards. Mackenzie's Hedysarum or Sweet-broom. 



Fig. 2922. 



Hedysarum Mackenzii Richards, in Frankl. 1st Journ. Bot. App. 745. 1823. 



Stems 2-5 dm. high, strigose-pubescent or glabrate toward the base. Leaves 10-15 cm. long ; 

 leaflets 7-15, oblong-elliptic, 10-25 mm. long, glabrous above, cinereous-strigulose beneath; 

 calyx rather sparsely strigose-pubescent, the tube 3 mm. long ; teeth subulate, 4-5 mm. long ; 

 corolla purple, 18-20 mm. long; pods rather densely strigulose, 4-7-jointed, the joints 6-8 mm. 

 long, 4-6 mm. wide. 



Dry slopes usually among shrubs, Canadian Zone; Yukon to Alberta. In the Pacific States known only from 

 the Wallowa Mountains, Oregon. Type locality: barren grounds from Point Lake to the Arctic Sea. July-Aug. 



2. Hedysarum occidentale Greene. Western Hedysarum or Sweet-broom. 



Fig. 2923. 



Hedysarum occidentale Greene, Pittonia 3: 19. 1896. 



Stems usually several from the woody crown, erect, 3-6 dm. high, striate, glabrous or very 

 sparingly pubescent. Leaves subsessile, 7-15 cm. long; stipules brownish and scarious, the lowest 

 15-20 cm. long, sheathing, the upper smaller and lanceolate; leaflets 13-21, elliptic to ovate- 

 elliptic, 10-25 mm. long, mucronate, pilose on the midvein and along the margins on the lower 

 surface; racemes well exceeding the leaves, many-flowered; corolla reddish purple, 15-20 mm. 

 long; keel exceeding the other petals; pods of 1-3 joints, these elliptic-obovate, 6-9 mm. wide, 

 reticulate-veined, sparsely strigose. 



Dry slopes, near timber line. Boreal Zones; Olympic Mountains, Washington. Type locality: Olympic 

 Mountains, Washington. June-Aug. 



3. Hedysarum sulphurescens Rydb. Yellow Hedysarum or Sweet-broom. 



Fig. 2924. 



Hedysarum flavescens Coult. & Fisher, Bot. Gaz. 18: 300. 1893. Not Regel & Schmalh. 1882. 

 Hedysarum sulphurescens Rydb. Bull. Torrey Club 24: 251. 1897. 



Stems several from the perennial root, erect or ascending, 3-5 dm. high, appressed-pubescent 

 or nearly glabrous. Leaflets 11-15, oblong to oval, 1-4 cm. long, glabrous or nearly so, shining; 

 racemes much exceeding the leaves, loosely flowered; calyx strigose, the teeth lanceolate, 1-2 

 mm. long; corolla about 15 mm. long, sulphur-yellow; pods 2-3- jointed, the joints elliptic- 

 obovate, 6-7 mm. broad, reticulate-veined, glabrous. 



Open wooded slopes, Boreal Zones; eastern Washington (Okanogan County) and British Columbia to Al- 

 berta, Montana, and Wyoming. Type locality: Helena, Montana. June-Aug. 



23. ALHAGI [Tourn.] Adans. Fam. PI. 2: 328. 1763. 



Rigid branched shrubs with axillary spines. Leaves simple, small, entire; stipules 

 small. Flowers in axillary racemes, red ; the rachis rigid and spine-tipped ; bracts minute. 

 Calyx turbinate, the teeth short, subequal. Standard obovate, short-clawed ; wings oblong- 

 falcate; keel obtuse, incurved. Stamens diadelphous; anthers uniform. Ovary subsessile, 

 few- to many-ovuled; style filiform; stigma minute, terminal. Pod linear, compressed 

 or subterete, indehiscent, constricted between the seeds. Seeds reniform. [The Maure- 

 tanian name.] 



Three species, natives of the eastern Mediterranean region and central and eastern Asia. Type species, 

 Alhagi maurorum Medic. 



