28. Homálobus Nutt.; T. & G. Fl. N. A. 1: 352. 1838
Description
This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol2", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
28. Homálobus Nutt.; T. & G. Fl. N. A. 1: 352. 1838
Perennial herbs, with pinnate simple or pinnately 3-5-foliolate leaves, and racemose mostly small flowers, the peduncles short, or elongated. Keel of the corolla obtuse. Pod flat, glabrous or pubescent, completely I-celled, few-several-seeded, the sutures both prominent externally. [Greek, regular-lobes.]
Besides the following species, some 30 others occur in western North America. Type species: Homalobus caespitosus Nutt.
Plants leafy-stemmed; leaves pinnate; leaflets 9-23, thin. | 1. | H. tenellus. |
Plants scapose; leaves simple, or pinnately 3-5-foliolate, the leaflets very narrow. | 2. | H. caespitosus. |
1. Homalobus Tenéllus (Pursh) Britton. Loose-Flowered Milk Vetch
Fig. 2556
Astragalus tenellus Pursh, Fl. Am. Sept. 473. 1814. Ervum multiflorum Pursh, Fl. Am. Sept. 739. 1814. Homalobus multiflorits T. & G. Fl. N. A. 1: 351. 1838. A. multiflorus A. Gray, Proc. Am. Acad. 6: 226. 1864. H. stipitatus Rydb. Bull. Torr. Club 34: 419. 1907.
Ascending or diffuse, slender, branched, finely pubescent, or glabrate, io'-i8' high. Stipules broadly ovate, 1/2"-3" long, acute or obtuse, the upper ones connate; leaflets 9-23, thin, oblong, linear-oblong or oblanceo-late, obtuse at the apex, narrowed at the base, 6"-10" long; flowers yellowish-white, 3"-4" long, in loose spike-like racemes; pod stalked, straight, oblong, acute at each end, papery, glabrous, 6"-8" long, 2" wide.
Dry soil, Minnesota to Nebraska, Colorado, north to Saskatchewan and British Columbia. May-Aug.
2. Homalobus Caespitòsus Nutt. Tufted Milk Vetch
Fig. 2557
Homalobus caespitosus Nutt.; T. & G. Fl. N. A. 1: 352. 1838.
Astragalus caespitosus A. Gray, Proc. Am. Acad. 6: 230. 1864.
Silvery-canescent, much tufted from a deep root, 3'-6' high. Stipules scarious, much imbricated, lanceolate, acuminate, 4"-6" long; leaves simple, spatulate-linear, acute, 1'-2' long, or some of them 3-5-foliolate, with oblong-linear leaflets; peduncles scapiform, exceeding or equalling the leaves; flowers purple, 4"-$" long, in heads or short spike-like racemes; pod erect, sessile, few-seeded, oblong, acute, coriaceous, slightly curved, pubescent, 4"-5" long; calyx-teeth subulate.
In dry rocky soil, Nebraska to Colorado, Utah, North Dakota and Assiniboia. May-July.
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