BUCKWHEAT FAMILY 29 



usually several, decumbent, rather stout, 6-20 cm. long ; bracts foliaceous, oblong-linear, sub- 

 tending the rays of the umbel ; rays 2-6, 15-30 mm. long, stout and white-woolly, usually with a 

 whorl of small bracts near the middle; involucral tube turbinate, 5-10 mm. long, the lobes as 

 long, reflexed ; calyx white or pinkish, often turning deep rose in age, 5-7 mm. long, merely nar- 

 rowed at base but not stipe-like, glabrous ; achene glabrous ; styles slender, weak, 2 mm. long ; 

 filaments 5 mm. long, hairy at base. 



Rocky and gravelly soils, Boreal Zones; Siskiyou County south to Lake and Mariposa Counties, California, 

 and western Nevada. Type locality : collected by Lobb, probably in the northern Sierra Nevada. July-Sept. 



20. Eriogonum gracillimum S. Wats. Slender Eriogonum. Fig. 1368. 



Eriogonum gracillimum S. Wats. Bot. Calif. 2: 480. 1880. 



Eriogonum variabile Heller, Muhlenbergia 2: 24. 1905. 



Eriogonum angulosum var. victorense M. E. Jones, Contr. West. Bot. No. 12: 74. 1908. 



Eriogonum angulosum subsp. gracillimum Stokes, Gen. Eriog. 38. 1936. 



Annual, diffusely dichotomously branched from the base, 10-45 cm. high, more or less floccose, 

 the branches usually angled and the ultimate very slender. Basal leaves oblanceolate, 3-5 cm. long, 

 densely white-woolly below, lower stem leaves oblong-lanceolate, the margins revolute and 

 crisped; upper leaves reduced to foliaceous bracts; peduncles filiform, often recurved, 1-4 cm- 

 long, glabrous ; involucre turbinate, 2 mm. high, the lobes ovate-triangular, obtuse ; calyx rose- 

 colored tipped with white, 2 mm. long ; outer lobes oblong, rounded at apex, usually crenulate, the 

 inner similar but slightly smaller. 



Sandy or gravelly slopes and washes, Sonoran Zones; South Coast Ranges, San Benito County and Upper 

 San Joaquin Valley, California, to northern Lower California, east to Nevada and Arizona. Type locality: 

 Mojave Desert, California. April-Sept. 



21. Eriogonum angulosum Benth. Angle-stemmed Eriogonum. Fig. 1369. 



Eriogonum angulosum Benth. Trans. Linn. Soc. 17: 406. pi. 18. f. 1. 1837. 



Annual, dichotomously branched from near the base and woolly-tomentose throughout, the 

 branches more or less angled, 5-30 cm. high, often spreading. Basal leaves oblanceolate to oblong- 

 oblanceolate, narrowed to a short petiole, 2-4 cm. long, revolute and crisped on the edges, stem 

 leaves sessile, lanceolate ; peduncles arising from most of the axils, very slender, pedicel-like, 1-2 

 cm. long, glabrous or sparsely tomentose ; involucre campanulate-turbinate, 2-3 mm. high, puberu- 

 lent or sometimes glabrous, the lobes rounded, about as broad as long ; bractlets broad, spatulate, 

 puberulent and sometimes tomentose; flowers many; stipules triangular-subulate, brown and 

 scarious ; calyx rose-colored tipped with white ; outer lobes ovate-elliptic, deeply concave, short- 

 clawed ; inner lobes sessile, narrowly spatulate, a little enlarged near the base ; achene 1.5 mm. long. 



Dry sandy soils, mainly Lower Sonoran Zone; Coast Ranges from Alameda County and foothills of the 

 southern Sierra Nevada to San Diego, California. Type locality: California (Douglas). Probably collected in 

 the South Coast Ranges. May-Oct. Nun's Veiling. 



Eriogonum angulosum var. maculatum (Heller) Jepson, Fl. Calif. 405. 1914. (E. inridescens Heller.) 

 Basal leaves oblong to elliptic-obovate, obtuse or rounded at apex; calyx glandular without with almost sessile 

 glands, 

 narrowe 



the body - 



to the deserts of southern California, western Arizona, and northern Lower California. 



Eriogonum bidentatum Jepson, Madrono 1: 115. 1923. Described from autumnal and winter stages, when 

 the flowers and rosettes have all matured and form a conspicuous rounded head; and the outer calyx-lobes more 

 conspicuously cucullate. Such stages are found in typical E. angulosum and in the variety maculatum. 



22. Eriogonum gossypinum Curran. Cotton Eriogonum. Fig. 1370. 



Eriogonum gossypinum Curran, Bull. Calif. Acad. 1: 274. 1885. 



Annual, the stems dichotomously branched from the base and diffuse, 3-20 cm. high, woolly- 

 tomentose. Basal leaves oblanceolate to obovate, obtuse or rounded at the apex, narrowed to the 

 petiole, 1 . 5-4 cm. long ; stem leaves lanceolate, sessile or subsessile, acute ; peduncles almost fili- 

 form, 2-15 mm. long; involucre turbinate, 3 mm. high, 5-lobed to near the middle, glabrous with- 

 out, densely and conspicuously clothed within with long cotton-like tomentum ; flowers few, con- 

 cealed in the dense cotton ; calyx 1 . 5-2 mm. long, puberulent, the lobes all similar, linear-oblong, 

 acute; achene 3-angled. 



Dry plains, Lower Sonoran Zone; Upper San Joaquin Valley, California. Type locality: near Bakersfield. 

 April-June. 



23. Eriogonum spergulinum A. Gray. Spurry Eriogonum. Fig. 1371. 



Eriogonum spergulinum A. Gray, Proc. Amer. Acad. 7: 389. 1868. 



Oxytheca spergulina Greene, Fl. Fran. 153. 1891. 



Oxytheca Reddingiana M. E. Jones, Bull. Torrey Club 9: 32. 1882. 



Slender annual, the stem simple to the first node, rarely with one or two lateral basal branches, 

 repeatedly dichotomously branched above, 1-3 dm. high, sparsely glandular with tack-shaped 

 glands. Basal leaves 2-3 cm. long, narrowly linear, narrowed to a short petiole, hispid, those of 

 the lower nodes similar but smaller, those of the upper reduced to 2 or 3 short bracts ; peduncles 

 filiform, 4-12 mm. long; involucre solitary, simulating a calyx, 0.5-1 mm. high, 4-lobed to below 

 the middle ; flower solitary, short-pedicelled ; calyx white, veined with rose, 1 mm. long, puberu- 

 lent without ; lobes oblong, the outer obtuse, the inner erose ; achene lenticular or obovoid. 



Dry sandy or gravelly flats, Arid Transition and Canadian Zones; Idaho and eastern Oregon to Nevada, 

 southern Sierra Nevada and Mount Pinos, California. Type locality: Big Creek, near Mariposa Grove, Cali- 

 fornia. June-Aug. 



