404 NORTH AMERICAN FLORA [Volume 24 



7. Jonesiella Rothrockii (Sheldon) Rydberg. 



Astragalus Rothrockii Sheldon, Minn. Bot. Stud. 1: 174. 1894. 



A perennial; stem 5 dm. high or more, striate, glabrous or nearly so, sometimes tinged with 

 brown; leaves ascending, 1-1.5 dm. long, the raehis glabrous; stipules broadly deltoid, about 

 4 mm. long, reflexed; leaflets 13-21, oval to oblong, 1-2.5 cm. long, 5-8 mm. wide, glabrous, 

 rather thick; peduncles about 1 dm. long, strict, striate or sulcate; racemes dense, many- 

 flowered, 2-4 cm. long; bracts lanceolate, 3 mm. long; pedicels 2 mm. long; flowers drooping; 

 calyx sparingly white-pilose, the tube 5 mm. long, 3 mm. broad, the teeth lance-subulate, 3 mm. 

 long; corolla ochroleucous ; banner obovate, moderately arched, 18-20 mm. long; wings some- 

 what shorter, the blade oblanceolate, with a rather large auricle; keel-petals much shorter, 

 the blade broadly lunate, almost semicircular, rounded and slightly purple-tipped at the apex; 

 pod rounded-ovoid, about 2 cm. long, 1 cm. wide, 1.5 cm. thick, cross-reticulate, puberulent 

 when young, the partial septum about 2 mm. broad; seeds brown, obliquely reniform, 3.5 mm. 

 long. 



Type locality: New Mexico. 



Distribution: New Mexico and Arizona. 



Illustration: M. E. Jones, Rev. Astrag. pi. 35 (as .4. Paltersoni var.). 



8. Jonesiella praelonga (Sheldon) Rydberg. 



Astragalus procerus A. Gray Proc. Am. Acad. 13: 369. 1878. Not .4. procerus Boiss. & Haussk. 



1872. 

 Astragalus praelongus Sheldon, Minn. Bot. Stud. 1: 23. 1894. 

 Astragalus Paltersoni procerus M. E. Jones, Proc. Calif. Acad. II. 5: 636. 1895. 

 Astragalus Paltersoni praelongus M. E. Jones, Contr. W. Bot. 10: 65. 1902. 

 Phacopsis praelonga Rydb. Bull. Torrey Club 32: 661. 1906. 

 Rydbergiella praelonga Kedde 8: Sydow, Bot. Jahresb. 33': 534. 1906. 



A perennial; stems 5-10 dm. high, striate, glabrous; leaves 1-15 cm. long, the raehis 

 glabrous; stipules broadly deltoid, 4—5 mm. long; leaflets 13-17, oval or obovate, 1-3 cm. long, 

 5-18 mm. wide, glabrous on both sides, rounded to cuneate at the base, rounded or retuse at 

 the apex; peduncles about 1 dm. long; racemes rather dense, 5-8 cm. long; bracts lanceolate, 

 2-3 mm. long, about equaling the pedicels; calyx puberulent with fine white hairs, the tube 

 about 6 mm. long and 3 mm. broad, the teeth deltoid or lance-deltoid, 1.2-2 mm. long; corolla 

 ochroleucous, 18-20 mm. long; banner obovate, moderately arcuate; wings slightly shorter, 

 the blade oblanceolate, falcate, longer than the claw, with a large basal auricle; keel-petals 

 shorter and broader, the blade lunate, almost semiorbicular, rounded at the apex; pod according 

 to original description about 2.5 cm. long, short-stipitate, oval in outline, obtuse, glabrous; 

 mature pod not seen. 



Type locality: Near St. Thomas, Nevada, at the confluence of Muddy River with the Virgin. 

 Distribution: Southern Nevada and southwestern Utah. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 57. 



9. Jonesiella asclepiadoides (M. E. Jones) Rydb. Bull. Torrey 

 Club 32: 661. 1906. 



Astragalus asclepiadoides M. E. Jones, Zoe 2: 238. 1891. 



A perennial, with a woody root; stems several, 3-5 dm. high, striate or sulcate, glabrous, 

 stout; leaves unifoliolate, almost sessile; stipules large, deltoid, membranous, 5-8 mm. long; 

 leaflet suborbicular, cordate at the base, 2-4 cm. long and as wide, 5-9-ribbed, thin, glabrous; 

 peduncles 2-5 cm. long, sulcate; bracts lanceolate; flowers 5-10, ascending; calyx sparingly 

 black-hairy or glabrate, the tube cylindric, 10-12 mm. long, the teeth subulate, 3 mm. long; 

 corolla white, about 2 cm. long; banner narrowly obovate, moderately arched; wings shorter, 

 the blade lunate, acutish, with a long reflexed auricle; keel-petals still shorter, the blade broadly 

 lunate, rounded at the apex, with a smaller auricle; pod long-stipitate, the stipe 1.5-2 cm. 

 long, erect, the body broadly lance-ellipsoid, 3-4 cm. long, more than 1 cm. wide and fully 

 1.5 cm. thick, more gradually tapering at the upper end than at the lower end, slightly sulcate 

 on both sutures, the septum about 1 mm. wide. 



Type locality: Price River, eastern Utah. 



Distribution: Utah. 



Illustrations: M. E. Jones, Rev. Astrag. pi. 34, f. 116; pi. 75; Am. Jour. Bot. 16: pi. 17 Q. 



