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RYDBERG: ASTRAGALUS AND ITS SEGREGATES 
7. Jonesiella Rydb. gen nov. 
Stout perennial with a woody root and simple stems. Leaves 
unifoliolate, thick and veiny; stipules broadly triangular, thin. 
Racemes 6-8-flowered, axillary. Calyx cylindric, 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. 
Jonesiella asclepiadoides (Jones) Rydb. 
Astragalus asclepiadoides Jones, Zoe 2: 238. 1891. 
8. Phacopsis Rydb. gen. nov. 
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 campanulate; lobes lanceolate- 
subulate, nearly equaling the tube, at last with spreading tips. 
Corolla ochroleucous with purple-tipped keel; banner and wings 
narrow. Pod oblong-ovate, coriaceous, somewhat inflated, with a 
more or less distinct partial partition formed by the inflexion of the 
suture. 
The first species is to be regarded as the type. 
Phacopsis praelongus (Sheld.) Rydb. 
Astragalus procerus A, Gray, Proc. Am. Acad. 13: 369. 1878. 
Not A. procerus Boiss. & Haussk. 1872. 
Astragalus praelongus Sheld. Bull. Geol. & Nat. Hist. Surv. 
Minn. 9: 23. 1894. 
Phacopsis Pattersoni (A. Gray) Rydb. 
Astragalus Pattersoni A. Gray in Brandegee, Bull. U. S. Geol. 
eres heir. 2 S235) FBO, 
Gray, Watson and Sheldon associated A. Pattersoniit with A. 
Fendleri and A. Halli, but the pod is practically that of Xy/o- 
phacos, t. e., A. Shortianus and its allies, but shorter and more 
inflated. It has a partial partition, although not so prominent as 
in the preceding. These two species might have been included in 
Aylophacos, but they have a different habit and different calyx. 
9. XYLOPHACOS Rydb. ; Small, Fl. SE. U. S. 
Gig... 1607. 
Besides the type, XY. Shortianus (Nutt.) Rydb., and X. missou- 
riensis (Nutt.) Rydb., the following are found in Colorado: 
