664 Rydberg : Astragalus and its segregates 



Cnemidophacos flavus (Nutt.) Rydb. 



Astragalus flaviis Nutt m T. & G. Fl. N. Am. i : 335, 1838- 

 Tragacantha flainflora Kuntze, Rev. Gen. PL 2 : 941. 1891. 

 Astragalus flavifloriis Sheld. Bull. Geol. & Nat. Hist Surv. Minn. 



9: 158. 1894, 



This has been placed in the Eti-Astragahis division, next after 

 A, racemosus, and in a section together with A. hwninistratus and 

 A, oreganus, to which it has no relationship. The only similarity 

 is the conspicuousness of the stipules. 



13. Diholcos Rydb. gen. nov. 



Stout erect perennials often forming clumps. Leaves pinnate 

 with many thick leaflets ; stipules lanceolate, free. Raceme many- 

 flowered, dense, spike-like; bracts lance-subulate. Calyx campanu- 

 late, gibbous at the base on the upper side ; teeth subulate- 

 setaceous. Corolla purple, white or ochroleucous ; petals only 

 moderately curved and blunt Pod coriaceous, stipitate, oblong, 

 straight, rounded on the lower suture, deeply 2-grooved above 

 and with a prominent upper suture, i -celled. 



The first species is to be regarded as the type. 



Diholcos bisulcatus (Hook.) Rydb. 



Phaca bisulcata Hook. Fl, Bor. Am. l: 145. 1 831. 

 Astragalus bisulcatus A. Gray, Pac. R. R. Rep. 12 : 42, i860. 



Diholcos decalvans (Gandoger) Rydb. 



Astragalus bisulcatus decalvans Gandoger, Bull. Soc. Bot. France 

 48 : XV. igo2. 



Diholcos Haydenianus (A. Gray) Rydb. 



Astragabis Haydenianus A. Gray in Brandegee, Bull. U. S. Geol. 

 Surv. Terr. 2 : 235. 1876. 



Nutt 



14. PHACA L. Sp. PI. 755. 1753. 



^ + 



Colorado species are as follows : Phaca longifolia (Pur, 

 picta A. Gray, P, Candollcana H. B. K., P. paucifl^ 



Eastwoodiae (Jones) 



itus Jones, Zoe 4 : ly. 1S93. 

 Jones, Zoe 4 : 368. 1894. 



Phaca artipes (A. Gray) Rydb. 



■tipes A. Gray, Proc. Am, Acad. 13 : 370. 1878. 



