BUCKWHEAT FAMILY 43 



65. Eriogonum Heermannii Dur. & Hilg. Heermann's Eriogonum. Fig. 1413. 



Eriogonum Heermannii Dur. & Hilg. Pacif. R. Rep. S: 14. 1855. 

 Eriogonum Heermannii subsp. occidentale Stokes, Gen. Eriog. 90. 1936. 

 Eriogonum Howellii Stokes, Gen. Eriog. 91. 1936. 



Distinctly woody below, 3-10 dm. high, the lower leaf-bearing part of the branches floccose, 

 the upper part glabrous and pale green. Leaves oblong-lanceolate to oblanceolate, 10-15 mm. long, 

 white-woolly beneath, green above, short-petioled ; flowering branches dichotomously branched 

 into a cymose panicle, the branchlets spreading and rigid ; involucres solitary in the forks or termi- 

 nal broadly turbinate, 2 mm. long, glabrous, lobed to near the middle, the lobes rounded ; flowers 

 many in the involucres ; calyx yellowish, 3-4 mm. long, glabrous, outer lobes rounded, the inner 



narrow. 



Dry ridges, Arid Transition and Upper Sonoran Zones; South Coast Ranges, San Benito County, to Mount 

 Pinos Ventura County, east to the southern Sierra Nevada, California, and western Nevada from Humboldt 

 County to Esmeralda County. Type locality: "Pose Creek," Kern County, California. July-Sept. 



Eriogonum Heermannii var. floccosum Munz, Man. S. Calif. 121, 597. 1935. Differs essentially only 

 in having the branches of the inflorescence floccose-tomentose instead of glabrous. Little San Bernardino and 

 Providence Mountains, California. Type locality: Clark Mountain, California. 



Eriogonum sulcatum var. argense M. E. Jones, Contr. West. Bot. No. 11: 15.. 1903. Diffusely and 

 intricately branched, 1-2 dm. high, floccose-tomentose, the internodes not grooved as in typical E. sulcatum. 

 Leaves 1 cm long, narrowly oblanceolate, revolute, glabrate above, tomentose beneath; inflorescence 'intricately 

 and compactly trichotomous-branched, minutely scabrous; involucres 1 mm. long, glabrous. Not convincingly 

 distinct from dwarf forms of E. Heermannii. Argus Mountains, Inyo County, California. 



66. Eriogonum ovalifolium Nutt. Oval-leaved Eriogonum. Fig. 1414. 



Eriogonum ovalifolium Nutt. Journ. Acad. Phila. 7: 50. 1834. 

 Eucycla ovalifolia Nutt. Journ. Acad. Phila. II. 1: 166. 1848. 



Densely cespitose perennial, with a short and closely branched caudex. Leaves crowded, 

 orbicular to obovate, densely white-tomentose, 4-12 mm. long, abruptly narrowed to a usually 

 short petiole; flowering stem scapose, 2-10 cm. high, slender, tomentose; involucres several, 

 crowded into a congested head, campanulate, woolly-tomentose ; bracts several, closely subtending 

 the head ; calyx yellowish with green or pink veins, 3-4 mm. long, glabrous ; outer lobes elliptic, 

 subcordate at base, the inner broadly spatulate ; filaments hairy at base. 



Rocky alpine slopes and ridges, Boreal Zones; British Columbia to California, east to the Rocky Mountains 

 and Great Basin. In the Pacific States the typical species is mainly east of the Cascade-Sierra Divide, lype 

 locality: "Headwaters of the Missouri River." July-Sept. 



Eriogonum ovalifolium subsp. flavissimum (Gandoger) Stokes, Gen. Eriog. 68. 1936. (£. flavissimum 

 Gandoger Bull Soc. Bot. Belg. 42: 193. 1906.) Flowers yellow as in the typical species, but inflorescences 

 sparingly'branched. Eastern Oregon. Type locality: Silver Creek, Harney County, Oregon. 



Eriogonum ovalifolium subsp. vineum (Small) Stokes, Gen. Eriog. 68. 1936. (£. vineum Small, Bull. 

 Torrey Club 25: 45. 1898. E. rubidum Gandoger, E. roseiflorum Gandoger, op. cit.) This species is the more 

 common representative of the species in the Pacific region extending from the Cascades of British Columbia and 

 the Olympic Mountains, Washington, to the southern Sierra Nevada, California. Flowers white tinged with 

 rose, often deep rose or wine red in age; basal leaves less compact than the type. Eriogonum nxvale Canby is a 

 small-flowered alpine form. 



67. Eriogonum proliferum Torr. & Gray. Proliferous Eriogonum. Fig. 1415. 



Eriogonum oblongifolium var. minus Benth. in DC. Prod. 14: 10. 1856. 

 Eriogonum proliferum Torr. & Gray, Proc. Amer. Acad. 8: 164. 1870. 

 Eriogonum ovalifolium var. proliferum S. Wats. Proc. Amer. Acad. 12: 263. 1877. 

 Eriogonum strictum subsp. proliferum Stokes, Gen. Eriog. 67. 1936. 



Caudex cespitose from a low mat, densely leafy, the younger white-lanate. Leaves white- 

 lanate throughout, the petioles slender, much longer than the blades, these round-ovate to elhptic- 

 ovate, 8-20 mm. long, plane; flowering stem rather stout, 15-25 cm. high, floccose, leafless; bracts 

 small, linear to triangular-subulate ; inflorescence cymose-umbellate, all the rays widely spread- 

 ing, the primary 2-6, the secondary in pairs ; involucres few, forming small heads in the primary 

 and secondary forks as well as terminal, 5 mm. high, oblong-turbinate, 5-toothed, tomentose ; 

 flowers yellow or cream-white, 3 mm. long, with lobes broadly elliptic, subcordate at base, rounded 

 at apex, inner obovate ; ovary glabrous ; filaments hairy at base. 



Dry rocky slopes and plains, Upper Sonoran and Arid Transition Zones; eastern Washington to north- 

 eastern California, Idaho, and Nevada. Type locality: "Idaho Mountains." June-Aug. 



68. Eriogonum ochrocephalum S. Wats. Ocher-flowered Eriogonum. Fig. 1416. 



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

 Eriogonum ochrocephalum var. agnellum Jepson, Fl. Calif. 422. 1914. 

 Eriogonum ochrocephalum subsp. calcareum Stokes, Gen. Eriog. 92. 1936. 



Cespitose, the caudex much branched and low, the seasonal growth leafy and densely white- 

 tomentose. Leaves densely white-tomentose on both surfaces, oblanceolate, 15-25 mm. long, plane, 

 narrowed to a slender petiole of equal or usually greater length; flowering stems scape-like, 5-15 

 cm. high, tomentose, bearing a single terminal head of several involucres, minutely bracteate or 

 bractless'; involucres turbinate-campanulate, sparsely villous-tomentose, 3-4 mm. long; calyx 

 glabrous, yellow, 2-3 mm. long, the lobes broadly obovate. 



Dry loose soils, especially volcanic ash, mainly Arid Transition Zone ; southeastern Oregon and adjacent 

 Idaho to central Nevada and the eastern slopes of the northern Sierra Nevada, California. June-July. 



