154 Preussii. 



species grows from Moab Utah on the Grand river, down the Colorado 

 to Nevada and westward to Amargosa desert California and south- 

 ward west of the Colorado river to the Mexican line. Most of the 

 Utah forms have congested inflorescence and few flowers. 



Astragalus Preussii var. Eastwoodae Jones Cont. 6 368 (1894) as 

 species. A. Preussii var. sulcatus .Jones, Phaca Rydberg. Pods about 

 oval, about 1.5 cm. long and 1 cm. high and wide, straight, abruptly 

 rounded at both ends, very shortly-stipitate, shortly-apiculate-beaked, 

 chartaceous, a little obcompressed, sulcate rather deeply ventrally, 

 and variably sulcate dorsally. Flowers few and short-racemose, as 

 in the type but banner often erect, and keel tip often erect and 4-5 mm. 

 high and triangular. Calyx as in the type, but black-speckled. Ped- 

 uncles shorter than the leaves. Leaves very narrow, very many, 1-1.5 

 dm. long, strict with about 10 pairs of linear-lanceolate and very .tc ;te 

 leaflets, 7-20 mm. long. Stems caespitose, decumbent from a thick 

 and woody root, rarely over 2 dm. long, rather slender and with short 

 internodes. Growing on bare rocky ledges or outcrors in deserts, 

 Lower Temperate life zone from Moab •i.nd Thompsons Springs 

 and Green River Utah to Monticello. A. Preussii var. lat.is Jones (var. 

 arctus Sheldon) is a similar form with stipe often neaily as long as 

 calyx and pods not sulcate. Calyx 3 mm. wide and 1 cm. long, the 

 teeth subulate and about one third as long. The leaflets generally 

 elliptical and barely acute, often 7 mm. wide, but varying (as they do 

 in the var. Eastwoodse) from linear to broadly elliptical even on the 

 same plant, the earlier leaflets are broader and the late ones narrower, 

 One would hardly be prepared for such extreme variations in leaflets in 

 the same species, and in habit, but these are manifestly all forms of 

 one species as is shown by similar variations in A. Pattersoni. as well 

 as in this fepecies. 



110. Astragalus ampullarius Watson Am. Nat. 7 4 (1873). Pods 

 ascending, oval-ovate, about 2 cm. long and 1 cm. wide, about round 

 in cross section, conical-beaked and straight, about as in A. ascle- 

 piadoides. chartaceous, with filiform stipe about 2 cm. long and 

 three times as long as calyx. Flowers purple, the banner nearly 

 2 cm. long and narrow, much longer than the very obtuse keel. 

 Calyx tube campanulate-cylindric, 4-7 mm. long, a little gibbous, teeth 

 minute. Spikes short, 2-3 cm. long, as long as the petioles, rather 

 dense. Pedicels stout, 2 vnw. loner in fruit and about as long 



as the bracts. Leaflets 3-5 pairs, obovate to obcordate-spa- 



tulate, 1-1.5 cm. long, smooth above, 7 mm. long, 4 mm. wide. Sti- 

 pules not connate, hyaline, 2-4 mm. long, broad. Stems short and 

 and ascending, hardly six inches long. Pubescence short-strigose 

 and appressed. Near Kanab, Utah. Mrs. Thompson. Not since 

 seen. Lower Temperate life zone. 



111. Astragalus limatus Sheldon Minn. Bot. Stud. 9 126 (1894). 

 Pods obliquely oval-oblong 2-2.5 cm. long and about 1 cm. high and 

 8 mm. wide, sessile except for the pseudostipe made by drying of 

 pulp, finely cross-ribbed with linear meshes, the ventral suture about 

 straight or a little convex above and inclined to be shallow-sulcnte, 

 Pod abruptly rounded at both ends, shortly beaked or conical-apic- 

 ulate (the beak nearly in line with tlie ventral suture), thin and soft 

 when fresh. Flowers as in A. Preussii, but short-spicate and many, 

 banner oblong-eriptical, but larger and coarse, nearly 1.5 cm. long, 

 with sides so closely refl^xed as to touch each other and making it 

 seem linear, reflexed part 3 mm. wide on each side in the middle; 

 groove deep and narrow, white and with deep-purple veins; white 

 spot goes nearly to tip; blade gently arched to erect from end of 

 teeth. Wings broadly linear, purple, nearly straight, narrowed above 

 the keel the blade 1 cm. long, 3 mm. wide in the middle and 2 mm. 

 at tJp. obtuse and not notched, overlapping each other beyond keel 



