Part 7, 1929| FABACEAE: GALEGEAE 461 



2. Geoprumnon succulentum (Richards.) Rydb. Bull. Torrey Club 



32: 658. 1906. 



Astragalus succulentus Richards, in Frankl. Journev 746. 1823. 

 Astragalus prunifer Rvdb. Mem. N. Y. Bot. Gard. 1: 239. 1900. 

 Astragalus mexicanus Rydb. Fl. Neb. 21: 52. 1895. Not A. mexicanus A. DC. 1833. 



A perennial, with a eespitose rootstock; stems several, decumbent, sparingly strigose; 

 leaves spreading, 5-8 cm. long; stipules lanceolate or ovate, acuminate, 5-8 mm. long; leaflets 

 13-19, elliptic or oval, 5-20 mm. long, 4-1 mm. wide, yellowish-green, glabrate above, strigose 

 beneath, rounded to acutish at the apex; peduncles 4-7 cm. long; racemes dense, 3-4 mm. 

 long; bracts lanceolate or lance-linear, 5-8 mm. long; pedicels very short; calyx more or less 

 black-hairy, S— 10 mm. long, the teeth subulate, 3 mm. long; corolla ochroleucous, with purple- 

 tipped keel, 20-23 mm. long; banner oblanceolate, retuse, slightly arcuate; wings nearly as 

 long, the blade oblong, nearly straight; keel-petals much shorter, the blade broadly 7 lunate; 

 pod subglobose, glabrous, 2-2.5 cm. in diameter. 



Type locality: "Neighborhood of Carlton" [House, Saskatchewan], 

 Distribution: Saskatchewan and Alberta to Colorado and Nebraska. 

 Illustration: Fl. Neb. 21: pi. 11, f. 116, 117 (as A. mexicanus). 



3. Geoprumnon mexicanum (A. DC.) Rydb.; Small, Fl. SE. U. S. 



616, 1332. 1903. 



Astragalus mexicanus A. DC. Mem. Soc. Geneve 6: 224. 1833. 



Tragacantha mexicana Kuntze, Rev. Gen. 946. 1S91. 



Astragalus crassicarpus pachycarpus M. E. Jones, Contr. W. Bot. 8: 16, in part. 1898. 



A perennial, with a rootstock; stems several, decumbent at the base, about 3 dm. long, 

 striate, sparingly strigose; leaves 8-15 cm. long, ascending or spreading; stipules deltoid or 

 lance-deltoid, 6-S mm. long, acuminate; leaflets 21-31, obovate, oval or elliptic, pilose on both 

 sides or glabrate above, 6-12 mm. long, 4-5 mm. wide; peduncles 5-7 cm. long; racemes about 

 3 cm. long; bracts lanceolate, 5-6 mm. long; calyx strigose-pilose, the tube 8-9 mm. long, the 

 teeth subulate, 5 mm. long; corolla 25-2S mm. long; banner narrowly obovate, retuse; wings 

 much shorter, the blade oblong, somewhat falcate; keel-petals broadly lunate; pod broadly 

 ellipsoid, 3-3.5 cm. long, 1.75-2 cm. thick, glabrate. 



Type locality: Guadelupe River, Texas. 

 Distribution: Texas. 



Illustrations: Mem. Soc. Geneve 6: pi. 3; M. E. Jones, Rev. Astrag. pi. 61 (as .4. crassicarpus 

 var. pachycarpus). 



4. Geoprumnon trichocalyx (Nutt.) Rydb. Bull. Torrey 

 Club 53: 163. 1926. 



Astragalus trichocalyx Nutt.; T. & G. Fl. N. Am. 1: 332. 1838. 



Astragalus mexicanus A. Gray, PI. Wright. 1: 51, in part. 1852. Not A. mexicanus DC. 1833. 



Geoprumnon mexicanum Rydb.; Small, Fl. SE. U. S. 616, 1332, in part. 1903. 



A perennial, with a eespitose woody rootstock; stems several, 3-5 dm. long, decumbent at 

 the base, glabrous below, strigose above; leaves ascending, 8-10 cm. long; stipules deltoid, 6-8 

 mm. long, thin, acuminate; leaflets 15-23, elliptic, oval or obovate, rounded or slightly retuse 

 at the apex, 5-15 mm. long, glabrous above, appressed-pilose beneath; peduncles 5-S cm. long; 

 racemes dense, 2-3 cm. long; bracts lanceolate, 3-5 mm. long; pedicels about 1 mm. long; 

 calyx white-villous, the tube S-9 mm. long, 4 mm. broad, the teeth subulate, 1.5 mm. long; 

 corolla ochroleucous or cream-colored, about 2 cm. long; banner oblanceolate, slightly arched 

 at the middle; wings much shorter, the blade oblong, falcate, with a large auricle; keel-petals 

 still shorter, the blade broadly lunate, rounded at the apex; pod globose or nearly so, 2-2.5 

 cm. long, 2 cm. thick, glabrous. 



Type locality: Plains of Arkansas. 



Distribution: Illinois to southern Kansas, Texas, and Louisiana. 



Illustrations: M. E. Jones, Rev. Astrag. pi. 61, f. 197; Britt. & Brown, 111. Fl./. 2126; ed. 2. 

 /. 2531 (all as .4. mexicanus). 



