Rvdberg: Astragalus and its segregates 6G1 



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. 1 89 1. 



w 



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 h. 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 Patterson! (A. Gray) Rydb. 



Astragalus Pattersoni A. Gray in Brandegee, Bull. U. S. Geol. 



Surv. Terr. 2 : 235. 1876. 



Gray, Watson and Sheldon associated A. Patterso nil with A. 

 Fendleri and A. Hallii, but the pod is practically that of Xylo- 

 pJiacos, i. 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 

 Xylophacos, but they have a different habit and different calyx. 



9. XYLOPHACOS Rydb. ; Small, Fl. SE. U. S. 



619. 1903. 



Besides the type, X. Shortianus (Nutt.) Rydb., and X. missou- 

 riensis (Nutt.) Rydb., the following are found in Colorado : 



