BUCKWHEAT FAMILY 



413 



Fig. 78. a, ERIOGONUM DASYANTHEMUM T. & G.; involucre, 

 b, E. VIMINEUM Dougl.; involucre, x 5. 



near the base, the branches elongated and virgate, with the lower often in 

 whorls of 3 to 5; lower forks sometimes leafy; leaves orbicular to broadly 

 ovate, 3 to 12 lines broad, greenish, reddish, or yellowish, white tomentose 

 below, the margin undulate, at least in age, the petioles 1 to 3 times as long; 



involucres very narrow, 

 cylindric, strongly angled, 

 1 to 1.1/2 lines long ; flowers 

 rather few, rose-color, or 

 yellowish, glabrous, 1 line 

 long; outer calyx seg- 

 ments obovate, rounded at 

 apex, the inner oblong. 



Coast Range hills, es- 

 pecially slopes near rocky 

 outcroppings. 



Locs. Napa Valley, Jepson 

 2976; Howell Mt., Brandegee; 

 Mt. St. Helena, Jepson; Blue 

 Lakes, Lake Co., Jepson; Mt. 

 Konocti, Jepson; Willow Creek, 

 Humboldt Co., Tracy 3451; 

 Shasta Sprs., Jepson; Yreka, 

 Butler 1572; Scott Valley, Sis- 

 kiyou Co., Jepson 2957; Dixey Valley, Lassen Co., M. S. Baker; Belrlen, Feather River, Jepson 

 4151; lone, Braunton 1166. 



Var. elegans Jepson n. comb. Stem for a half-inch at base densely 

 clothed with white-woolly obcordate small leaves ; involucres turbinate ; calyx 

 rose-red or whitish, y 2 line long. San Luis Obispo Co. 



Var. caninum Greene. Stems several from the base, procumbent or very 

 diffuse, repeatedly di- or at first tri-chotomous, with short forks and branchlets, 

 or the stem sometimes solitary, erect and branching only at the first node ; 

 inflorescence and stems reddish; involucres narrowly turbinate, mostly at the 

 ends of the short branches or sessile in the forks; calyx rose-red. Oakland 

 Hills; Marin Co.; Monterey Co. 



Eefs. ERIOGONUM VIMINEUM Dougl.; Benth. Trans. Linn. Soc. 17: 416 (1837), type from 

 the Columbia River, Douglas. Var. californicum Gand. Bull. Soc. Roy. Bot. Belg. 42j 199 

 (1905), type loc. Petaluma, Tidestrom. E. luteolum Greene, Pitt. 3: 200 (1897), type loc. Napa 

 Valley, Greene. Var. ELEGANS Jepson. E. elegans Pitt. 2: 173 (1891), type loc. upper Salinas 

 River, A. Norton. Var. CANINUM Greene, Fl. Fr. 150 (1891), type loc. Tiburon, Greene. 

 E. norioni Greene, Pitt. 2: 165 (1891), type loc. Gonzales, Monterey Co., A. Norton. 



26. E. baileyi Wats. Diffusely branched from the base, glabrous, 5 to 12 

 inches high, and half again as broad, with something of the delicate or slender 

 habit of E. gracile ; leaves roundish to ovate, white-woolly ; involucres cylin- 

 dric or a little enlarged upwards, % to % line long; calyx lemon yellow or 

 whitish, delicately glandular, % line long; outer segments ovate or oblong, 

 the inner smaller, narrowly ovate ; body of achene lenticular, strongly beaked. 



Desert valleys : Mohave Desert north to Inyo Co. and western Nevada ; 

 Arizona to Washington. 



Var. brachyanthum Jepson n. comb. Stems usually greenish rather than 

 pale or glaucous, at base with a persistent lanate zone; internodes shorter 

 and relatively stouter; bracts redder; calyx glabrous in age, usually con- 

 stricted a little at middle and flaring at tip, as often in the species. Mohave 

 Desert north to Inyo Co. Well-grown plants recall in miniature the habit 

 of a Texas Umbrella Tree. 



Locs. Victor, Jepson 5614; Barstow, Jepson 5241; Olancha, Jepson 5131; Alabama Hills, 

 Jepson 915; Cottonwood Creek, Purpus 3034; Indian Wells, Purpus 3030. 



