30 POLYGONACEAE 



24. Eriogonum hirtiflorum A. Gray. Hairy-flowered Eriogonum. Fig. 1372. 



Eriogonum hirtiflorum A. Gray ex S. Wats. Proc. Amer. Acad. 12: 259. 1877. 

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



Low dichotomously branching annual, 5-15 cm. high, the branches sparsely glandular. Leaves 

 broad, obovate to spatulate-oblanceolate, 1-2.5 cm. long, 4-8 mm. wide, narrowed from the 

 rounded apex to the winged petiole, ciliate on the margins, otherwise nearly or quite glabrous ; 

 bracts 3-parted, the segments linear-oblong; involucres on short very slender pedicel-like pe- 

 duncles, or sessile in the forks, scarcely 1 mm. long ; flowers 2, exserted on a short pedicel ; calyx 

 barely 2 mm. long, the lobes pubescent on the back with hooked hairs, oblong, reddish; achene 

 slightly exserted. 



Dry gravelly soil, Arid Transition Zone; North Coast Ranges and the Sierra Nevada, California. Type 

 locality: "Collected by Dr. Gray, 1872, probably in the mountains of California." June-Oct. 



25. Eriogonum inerme (S. Wats.) Jepson. Unarmed Eriogonum. Fig. 1373. 



Oxytheca inertnis S. Wats. Proc. Amer. Acad. 12: 273. 1877. 

 Eriogonum vagans S. Wats. Proc. Amer. Acad. 20: 370. 1885. 

 Eriogonum inerme Jepson, Fl. Calif. 406. 1914. 



Annual, the stem simple to the first node or rarely with 2 or 3 basal branches, then re- 

 peatedly dichotomously branched, the branches usually widely divergent, 5-30 cm. high, sparingly 

 glandular with stipitate glands. Basal leaves spatulate, 12-25 mm. long, 4-8 mm. broad, ciliate 

 on the margins, otherwise glabrous; bracts herbaceous, deeply 3-lobed, sparsely hirsutulose; 

 branches few and stouter than in the preceding ; involucres in the axils of the bracts on pedicel-like 

 peduncles 0.5-2 mm. long, deeply 4-lobed, 1.5 mm. long, 3-4-flowered; calyx hirsutulose with 

 hooked hairs, the lobes oblong, 1.5 mm. long, equaling or slightly shorter than the achene. 



Dry barren soils, Upper Sonoran and Arid Transition Zones; from Mount Diablo south in the Coast Ranges, 

 and from the southern Sierra Nevada to the San Bernardino Mountains, California. Type locality: "California, 

 probably on Mt. Diablo." June-Aug. 



26. Eriogonum apiculatum S. Wats. San Jacinto Eriogonum. Fig. 1374. 



Eriogonum apiculatum S. Wats. Proc. Amer. Acad. 17: 378. 1882. 



Erect annual, simple at base, 2-9 dm. high, dichotomously branched, the branches few to 

 many, ascending, the ultimate very slender, lower portion of internode slightly glandular. Basal 

 leaves spatulate-oblanceolate to -obovate, 1.5-3 cm. long, ciliate and somewhat pilose; bracts 

 triangular or triangular-lanceolate, 1-2 mm. long; peduncles almost filiform, 4-25 mm. long; 

 involucre 1 . 5 mm. long, 4-lobed almost to the middle, the lobes rounded at apex, 2-3-flowered ; 

 calyx white, the lobes oblong-obovate, 2 mm. long, apiculate and often emarginate, puberulent. 



Dry open places, Arid Transition Zone; San Jacinto, Palomar and Cuyamaca Mountains, southern California. 

 Type locality: San Jacinto Mountains. July-Aug. 



27. Eriogonum Parishii S. Wats. Parish's Eriogonum. Fig. 1375. 



Eriogonum Parishii S. Wats. Proc. Amer. Acad. 17: 379. 1882. 



Annual with erect stems 1-3 dm. high, repeatedly dichotomously branched above the first 

 internode forming a dense rounded crown, the ultimate branchlets filiform but firm, glabrous ex- 

 cept for scattering stipitate glands above the nodes. Leaves all basal, spatulate, 1.5-5 cm. long, 

 hirsute; bracts 3, triangular-subulate, glabrous; peduncles filiform, straight, 4-12 mm. long; in- 

 volucre solitary, less than 1 mm. long, 5-lobed, 1- or rarely 2-flowered ; calyx rose-colored, 0.5-0.7 

 mm. long, minutely puberulent, outer lobes ovate, the inner oblong-spatulate ; achene slightly 

 exserted. 



Gravelly places, Upper Sonoran and Arid Transition Zones; San Gabriel and San Bernardino Mountains, 

 California, to northern Lower California. Type locality: Bear Valley, San Bernardino Mountains, California. 

 July-Sept. 



28. Eriogonum trichopes Torr. Yellow or Little Trumpet. Fig. 1376. 



Eriogonum trichopes Torr. in Emory, Notes Mil. Rec. 151. 1848. 

 Eriogonum trichopodum Torr. ex Benth. in DC. Prod. 14: 20. 1856. 

 Eriogonum clavatum Small, Bull. Torrey Club 25: 50. 1898. 



Erect annual, 1-4 dm. high, usually simple below, the first internode 2.5-12 cm. long, some- 

 times somewhat inflated above, branched above this repeatedly, the ultimate branchlets nearly 

 filiform, glabrous, or sparsely glandular above the nodes. Basal leaves suborbicular, 1-2 cm. 

 broad, cordate at base, crenate or rarely entire, pilose beneath, less so above; petioles slender, 

 1-2.5 cm. long, pilose; bracts triangular-subulate, those at the first node more or less pubescent; 

 peduncles capillary, 5—15 mm. long; involucre turbinate, 0.75 mm. long, 4-lobed, glabrous, few- 

 flowered; calyx hispidulose, yellow or greenish, 1 mm. long in flower, 2.5 mm. in fruit, the lobes 

 similar, narrowly ovate; achene 2 mm. long, included. 



Sandy desert slopes and washes, Lower Sonoran Zone; Inner Coast Ranges and foothills of the southern 

 Sierra Nevada and Mojave and Colorado Deserts, California to Utah, New Mexico, Lower California, and 

 Sonora. Type locality: mountains on the west side of the Colorado Desert, along the old San Felipe route, 

 California. March-July. 



29. Eriogonum Ordii S. Wats. Ord's Eriogonum. Fig. 1377. 



Eriogonum Ordii S. Wats. Proc. Amer. Acad. 21 : 468. 1886. 

 Eriogonum tenuissimum Eastw. Proc. Calif. Acad. IV. 20: 139. 1931. 



Slender annual, the stem erect, 2.4 dm. high, simple below, tri- or dichotomously branched 



