500 FABACEAE 



■^ ^ 



equal, subulate; corolla 15-18 mm. long; stipe of the pod about 5 mm. long; body 

 12-16 mm. long, 5 mm. wide. Astragalus bisulcalus decalvans Gand. Plains 

 and foot-hills : Colo.— Wyo. SubmonL Je. 



2. D. bisulcatus (Hook.) Rydb. Stems erect or decumbent at the base, 



sparmgly strigose or glabrate, 3-7 dm. high; leaflets 17-27, elliptic or rarely oval, 



1-2.5 cm. long; racemes many-flowered; calyx strigose, tinged with purple; tube 



4 mm. long; teeth subulate or lance-subulate, the upper 1.5-2 mm. long, the 



lower 2-3 mm.; corolla 12-15 mm. long; legiune strigose. A. bisulcatus A. Gray. 



Flams, hills, and river valleys: Sask.— Neb.— Colo,— Alta. Plain— SubmonL 

 Je-Au. 



3. D. scobinatulus (Sheld.) Rydb. Stems 3-6 dm. high, erect; leaflets 

 15-21, elliptic or oblong or oval, 8-20 mm. long, obtuse; raceme rather shortj 

 calyx sparmgly strigose; tube 4 mm. long; upper teeth triangular-subulate, 1-1.5 

 mm. long; lower subulate, about 2 mm. long; corolla fully 1 cm. long, cream- 

 colored; keel purple-tipped. A, Harjdenianus major Jones. A. scobinatulus Sheld. 

 A, Haydemanus Nelsonii Gand. Alkali flats and dry ground: Utah— Wyo. 

 Plain, Je. 



1 fi^o^ ^;- *^^^^®^^^^^^ ^^' ^^^^^ 'Rydh. Stems erect, 3-9 dm. high; leaflets 

 15-29, linear to elliptic, 7-20 mm. long; racemes elongate; calyx strigose, 

 usually with black hairs; tube 3^ mm. long; upper teeth triangular-subulate, 

 1 mm. long, the lower subulate, 1.5-2 mm. long; corolla 7-9 mm. long. A, 

 Haydenianus^ A. Gray. Dry soil: Colo.— Wyo.— Utah. SubmonL Je-Jl. 



5. D. micranthus Rydb. Stems erect or ascending, sparingly strigose or 

 glabrate, 2-4 dm. high; leaflets 17-25, linear or lance-oblong, acute at both ends, 

 7-20 mm. long; mcemes many-flowered; calyx strigose; tube 2-2.5 mm. long; 

 teeth subiUate-fihform, 1-2 mm. long, the upper somewhat shorter; corolla 6-7 

 mm. long, ochroleucous; stipe 3-4 mm. long; body scarcely 1 cm. long, very 

 acute. Dry table lands: Colo. SubmonL My-Jl. 



26. JONESIELLA Rydb. 



Stout perennial, with a woody root and simple stems. Leaves unif oliolate, 

 thick and vemy; stipules broadly triangular, thin. Racemes 6-8-flowered, 

 axillary. Calyx cyhndnc, somewhat gibbous, with triangular teeth. Corolla 

 ochroleucous, with a purple spot on the keel. Pod stipitate, coriaceous, elliptic, 

 turgid, partially 2-celled by the inflexion of the upper suture. 



1. J. asclepiadoides (M. E. Jones) Rydb. Stems 4-6 dm. high, erect or 

 ascending, glabrous and glaucous; leaves orbicular-ovate or cordate, entire, 

 veiny, thick, 3-5 cm. m diameter; raceme 6~8-flowered; calyx about 1 cm. long; 

 corolla 2 cm. long; pod glabrous; stipe about 1 cm. long; body ovoid, 2.5 cm. 



V??^,' ll'. ^ ^^- '^'^^^- Astragalus asclepiadoides M. E. Jones.- Sand-bars: 

 Utah — Colo. Son. Je. 



27. RYDBERGIELLA Fedde & Sydow. 



Stout erect glabrous perennials, more or less branched at the woody base. 



Leaves pinnate, with numerous leaflets; stipules ovate, almost free. Racemes 



rather many-flowered; flowers nearly sessile; bracts lanceolate. Calyx cam- 



panulate; lobes lanceolate-subulate, nearly equalling the tube, at last with spread- 

 ing tips. Corolla OCnrnlminniis -arith tm..-i^1q_+;>^»,„^ 1.„„1. U. J „„• 



banner 



° '^ ] Vi --.v.v^>.vy^o, «iuu yiii yiK-iipj^vu. Keei, Danner ana wings nar- 

 row. I'od oblong-oyate, coriaceous, somewhat inflated, with a more or less 

 distinct partial partition formed by the inflexion of the upper suture, more or 



less stipitate. [Phacopsis Rydb.] 



1 ^-th I ^^J'^l^'T' ^^""^Z^^ 2-ceUed, except at the apex. 1. R. scaphoides, 

 c^ ^ ?i?^°^j sometimes obsolete partial partition. 

 Stipe of the pod 4-8 mm. long. 



Leaflets oblanceolate or oblong. 2 R arrta 



^ . Leaflets obovate. ^ i -g" p"T,«-,- 



Stipe of the pod 1-2 mm. long; leaflets oblong to oval. treussii. 



P o^J ^i^^fn^f^ '''*?^.*^ oblong retuse. 4. R. praelonga. 

 Jr-lant hi>,pidulous-stngose on the upper parts of the stem and the lower surface 



of the leaves. 5_ _B_ Pattersonii. 



