NORTH AMERICAN FLORA 



[Volume 24 



pod linear-oblauceolate, straight, 2.5-3.5 cm. long, 5-7 mm. wide, canescent-strigose, tapering 

 below into a short stipe, the cross-section transversely elliptic. 



Type locality: Thirteen miles below Theodore, Utah. 

 Distribution: Northeastern Utah and northwestern Colorado. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 64. 



5. Lonchophaca kaibensis (M. E. Jones) Rydberg. 



Astragalus kaibensis M. E. Jones, Contr. W. Bot. 10: 64. 1902. 



A perennial, with a rootstock; stem flexuous, branched, sparingly strigose, 3-5 dm. high, 

 rush-like, striate; leaves 3-6 cm. long, the terminal leaflet not differentiated from the rachis; 

 stipules deltoid, 3 mm. long, caducous; lateral leaflets 0-4, linear, strigose, 3-8 mm. long, 

 involute; racemes including the peduncle 1.5-2 dm. long, lax; bracts deltoid, 2 mm. long; 

 pedicels 2 mm. long; calyx white-strigose, the tube 5 mm. long, 2 mm. broad, the teeth deltoid, 

 1 mm. long; corolla white; banner obovate, 12 mm. long; wings slightly shorter, the blade 

 oblanceolate, with a basal auricle; keel-petals about 11 mm. long, the blade obliquely lunate, 

 rounded at the apex; pod elliptic-oblong, acute at each end, 2-2.5 cm. long, 5-6 mm. wide, 

 glabrous, the cross-section transversely elliptic or oval. 



Type locality: House Rock, Lee's Ferry, Arizona. 

 Distribution: Known only from the type locality. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 64. 



43. BATIDOPHACA Rydb. gen. nov. 



Perennial herbs, with a cespitose caudex, the stems short, or, if elongate, diffusely spread- 

 ing. Leaves odd-pinnate, with mostly broad leaflets. Flowers perfect, in short, spike-like or 

 head-like racemes. Calyx campanulate, the teeth subulate, at least half as long as the tube. 

 Corolla of various colors. Banner broadly obovate, often retuse at the apex, strongly arched. 

 Wings almost as long as the banner, the blade oblanceolate, longer than the claw, with a large 

 basal auricle. Keel-petals slightly shorter, the blade broadly lunate, forming one third or one 

 fourth of a circle, acutish. Stamens diadelphous (9 and 1), the sheath straight, broadest at the 

 base, the free portion of the filaments arched upwards. Ovary sessile; style regularly arched 

 upwards; stigma minute. Pod one-celled, sessile, membranous or leathery, more or less 

 lunate or obliquely ovate in outline, tapering to both ends, the upper suture acute, straight or 

 arched upwards, the lower suture rounded or indexed at the middle, more strongly arched. 

 Seeds many, obliquely round-reniform, with a deep-seated hilum. 



Type species, Astragalus villosus Michx. 



Stipules large and membranous, connate around the stem; stems decumbent 

 and widely spreading, or in no. 8 and no. 9 very short and ascending. 

 Flowers several in short dense head-like or spike-like racemes. 

 Flowers 1 or 2 in small racemes. 

 Stipules narrow, distinct or nearly so; stems usually very short. 

 Flowers all alike, well developed, in peduncled racemes. 



Flowers of two kinds, some well developed in long-peduncled racemes, others 

 apparently cleistogamous, subsessite or on very short peduncles in the 

 axils of the leaves. 



1. HumistraTae 

 Plant green. 



Stem elongate, decumbent. 



Leaflets lance-oblong, 5-18 mm. long, glabrate above. 



Pod 1.5-2 cm. long, sulcate on the lower suture; leaflets mostly 



oblong; corolla 10-12 mm. long. 

 Pod 10—12 mm. long, not sulcate; leaflets mostly linear-lanceolate or 

 lance-oblong; corolla S-10 mm. long. 

 Leaflets elliptic or oval, 2-4 mm. (rarely 6 mm.) long, equally pubescent 

 on both sides. 

 Stem short; leaflets elliptic, pubescent on both sides. 

 Plant silvery-canescent, the leaflets equally pubescent on both sides. 



Stems elongate, 2-4 dm. long; calyx-lobes as long as or longer than the tube. 

 Plant spreading; calyx-tube 3-4 mm. long, about as long as the teeth; 

 pod firm. 

 Pubescence rather loose; pod distinctly sulcate at the middle on the 

 lower suture, more than 15 mm. long. 



i. humistratae. 

 2. Sesquiklorae. 



4. LOTIKLORAE. 



humistrata. 



Hosackiae. 



4. B. slipulacea. 



