Part 7, 1929) FABACEAE: GALEGEAE 387 



3 mm. wide and thick, cross-reticulate; upper suture sharp, the lower deeply sulcate; cross- 

 section triangular, inversely V-shaped, many-seeded. 



Type locality: Ramos, Zacatecas. 

 Distribution: Known only from the type locality. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 63. 



3. Tium racemosum (Pursh) Rydb. Bull. Torrey Club 

 32: 659. 1906. 



Astragalus racemosus Pursh, Fl. Am. Sept. 740. 1814. 



Astragalus galegoides Nutt. Gen. 2: 100. 1818. 



Tragacantha racemosa Kuntze, Rev. Gen. 947. 1891. 



Astragalus racemosus brevisetus M. E. Jones. Proc. Calif. Acad. II. 5: 662, in part. 1895. 



Astragalus racemosus longiselus M. E. Jones, Proc. Calif. Acad. II. 5: 663. 1895. 



A perennial, with a stout root and cespitose caudex; stems 4-10 dm. high, sulcate, flexuose, 

 more or less strigose; leaves 7-15 cm. long, ascending, the rachis strigose; stipules lanceolate 

 or deltoid, acuminate, connate, 5-8 mm. long; leaflets 17-33, oblong or linear-oblong, 1-2.5 

 cm. long, 3-S mm. wide, glabrous above, strigose-canescent beneath, obtuse to rounded at the 

 apex; peduncles 5-10 cm. long, sulcate, strigose; racemes 4—10 cm. long; bracts subulate, 3—7 

 mm. long; flowers nodding; pedicels 4—5 mm. long; calyx white-strigose, the tube 4—5 mm. long, 

 3 mm. broad, the teeth subulate, 2-4 mm. long; corolla white or pinkish, the keel purplish; 

 banner 15-16 mm. long, oblanceolate, slightly arched at the middle; wings slightly shorter, the 

 blade oblanceolate, as long as the claw, slightly falcate, with a large basal auricle; keel-petals 

 a little shorter, the blades obliquely oblanceolate, abruptly arched near the obtuse apex, with 

 a long reflexed auricle; pod glabrous, stipitate, the stipe 4-5 mm. long, the body linear, tapering 

 at each end, 2-2.5 cm. long, 4-5 mm. wide and 4 mm. thick, the upper suture acute, the lower 

 deeply sulcate, the cross-section triangular, the septum very narrow; seeds brown, obliquely 

 reniform, 3 mm. long. 



Type locality: "Upper Louisiana" [now South Dakota]. 

 Distribution: North Dakota to Oklahoma, Colorado, and Wyoming. 



Illustrations: M. E. Jones. Rev. Astrag. pi. 63, f. 208; PI. Neb. 22: pi. 9, f. 22-27; Britt. & 

 Brown, 111. Fl. /. 2134; ed. 2. /. 2540. 



4. Tium platycarpum Rydberg, sp. nov. 



A perennial; stem 3-5 dm. high, flexuose, striate, strigose; leaves S— 10 cm. long; 

 leaflets 17-19, elliptic, mucronate, 1.5-2.5 cm. long, 6-9 mm. wide, strigose beneath, glabrous 

 above, firm; peduncles 5-7 cm. long; racemes 5-8 cm. long; bracts subulate, 3 mm. long; 

 calyx white-strigose, the tube 6 mm. long, 3 mm. broad, gibbous on the upper side at the base, 

 the upper two teeth lance-deltoid, acuminate, the lower three subulate, 3 mm. long; corolla 

 apparently cream-colored, 17 mm. long; banner obovate, moderately arcuate; wings nearly 

 as long, the blade oblong, falcate, with large auricles; keel-petals similar, of the same length, 

 but broader; pod glabrous, cross-reticulate, the stipe about 7 mm. long, the body lunate, 3.5 

 cm. long, 6-7 mm. broad, tapering at each end, sulcate on the lower suture, triangular in cross- 

 section, the septum very narrow, almost obsolete. 



Type collected along Oak Creek, Colorado, in 1873, Brandegee (herb. Columbia Univ.). 



5. Tium scopulorum (Porter) Rydb. Bull. Torrey Club 

 32: 659. 1906. 



Astragalus scopulorum Porter; Porter & Coult. Syn. Fl. Colo. 24. 1874. 



Astragalus subcompressus A. Gray; Brand. Bull. U. S. Geol. Surv. Terr. 2: 234. 1876. 



Tragacantha scopulorum Kuntze, Rev. Gen. 948. 1891. 



Tragacantha subcompressa Kuntze, Rev. Gen. 948. 1891. 



Astragalus rasus Sheldon, Minn. Bot. Stud. 1: 158. 1894. 



A perennial, with a woody root and cespitose caudex; stems decumbent at the base, 3-6 

 dm. high, glabrous or sparingly strigose, angled; leaves ascending, 5-7 cm. long, the rachis 

 sparingly strigose or glabrate; stipules deltoid, green, 5-7 mm. long; leaflets 11-27, oblong or 

 elliptic, 8-15 mm. long, 3-7 mm. wide, obtuse or rounded at the apex, glabrous above, sparingly 



