BUCKWHEAT FAMILY 47 



73. Eriogonum Harfordii Small. Harford's Eriogonum. Fig. 1421. 



Eriogonum Harfordii Small, Bull. Torrey Club 25: 47. 1898. 

 Eriogonum capitatum Heller, Muhlenbergia 2: 27. 1905. 

 Eriogonum latifolium var. Harfordii Stokes, Gen. Eriog. 65. 1936. 



Perennial by horizontal few-branched rootstocks. Leaves basal, long-petioled, the blades 

 oblong-spatulate to elliptic-ovate, 2-4 cm. long, glabrate above, densely tomentose : beneath, the 

 margins plane or slightly undulate; flowering stems one to several, 5-10 dm high dichotomously 

 branched more or less densely lanate ; involucres in heads terminating the branchlets turbinate- 

 campanulate, 3-5 mm. long, lanate ; calyx white or rose, rarely yellowish, 3-4 mm. long, more 

 or less villous at the base, the lobes in age obovate ; filaments hairy below. 



Dry slopes, mainly Transition Zone; North Coast Ranges and northern Sierra Nevada, California. Type 

 locality: Long Valley, Mendocino County, California. May-Aug. 



74. Eriogonum elatum Dougl. Tall Eriogonum. Fig. 1422. 



Eriogonum elatum Dougl. ex Benth. Trans. Linn. Soc. 17: 413. 1937. 

 Eriogonum elatum var. villosum Jepson, Fl. Calif. 421. 1914. 

 Eriogonum elatum var. incurvum Jepson, loc. cit. 

 Eriogonum elatum subsp. glabrescens Stokes, Gen. Eriog. 98. 1936. 



Herbaceous perennial with a low branched or simple woody caudex. Leaves all basal, erect, 

 long-petioled, the blades oblong-ovate to ovate-lanceolate, 5-25 cm. long, acute or acutish at apex, 

 obtuse or truncate and then abruptly cuneate or decurrent at base, villous-tomentose on petioles 

 and lower surface, glabrate and green above; flowering stems 4-8 dm. high, rigid glabrous and 

 glaucous throughout or often short-villous toward the base and sometimes nearly throughout, 

 cymosely branched above into small or ample compound cymes ; involucres in terminal or some- 

 times axillary heads of 2-4, 4 mm. long, 5-toothed, glabrous or sparingly pubescent ; calyx white 

 or tinged with rose, 2.5 mm. long, pubescent without especially on the veins, the lobes obovate. 



Dry hillsides, Upper Sonoran and Arid Transition Zones; northeastern Washington south to Siskiyou 

 and Inyo Counties, California, and western Nevada. Type locality: Columbia River (Douglas). June-Sept. 



75. Eriogonum parvifdlium Smith. Dune Eriogonum. Fig. 1423. 



Eriogonum parvifolium Smith in Rees, Cycl. 13: No. 2. 1809. 



Eriogonum parvifolium subsp. lucidum Howell ex Stokes, Gen. Eriog. 87. 1936. 



Low spreading shrub, 3-10 dm. high, with slender densely leafy branches, thinly floccose. 

 Leaves fasciculate at the nodes, round-ovate to oblong-lanceolate, 8-12 mm. long, short-petioled, 

 thick revolute on the margins, densely white-tomentose beneath, dark green and shining above ; 

 heads solitary or racemosely disposed on a simple or umbellately branched peduncle ; involucres 

 4 mm. long, glabrate outside, woolly on the throat within; calyx white or tinged with rose, 

 glabrous, 3-4 mm. long, the lobes obovate ; filaments sparsely hairy. 



Dunes and hillsides along the coast, mainly Upper Sonoran Zone; Monterey Bay to San Diego County, 

 California. Type locality: California (Menzies), probably Monterey. June-Dec. 



76. Eriogonum cinereum Benth. Gray Coast Eriogonum. Fig. 1424. 



Eriogonum cinereum Benth. Bot. Sulph. 45. 1844. 



Straggly shrub, 6-16 dm. high, the branches tomentose. Leaves ovate, 15-25 mm. long, ob- 

 tuse or rounded at apex, abruptly cuneate at base, densely white-tomentose beneath, cinereous 

 above, the margins undulate; flowering branches elongated, sparingly branched; involucres in 

 heads at the nodes, cylindric-turbinate, 3-4 mm. long, lanceolate, 5-toothed ; calyx densely villous 

 without, 3 mm. long, the lobes narrowly obovate ; filaments glabrous. 



Bluffs and foothills near the coast, Upper Sonoran Zone; southern California from Santa Barbara to San 

 Pedro. Type locality: San Pedro, California. 



77. Eriogonum giganteum S. Wats. Giant Eriogonum. Fig. 1425. 



Eriogonum giganteum S. Wats. Proc. Amer. Acad. 20: 371. 1885. 



Shrub with stout branches 1-2.5 m. high, the trunk 3-10 cm. in diameter, rough-barked, the 

 younger branches white-tomentose, glabrate in age. Leaves tufted at the ends of the branches, 

 ovate to oblong-ovate, 2.5-8 cm. long, thick and leathery, densely white-tomentose and con- 

 spicuously veined beneath, cinereous and often somewhat glabrate above; peduncle stout, 10-30 

 cm. long, loosely tomentose, glabrate in age ; cymes compound, 10-30 cm. broad, leafy-bracted ; 

 involucres crowded, sessile or short-pedicelled, campanulate, 4 mm. long, the teeth short, obtuse ; 

 calyx white or rose-colored, villous-tomentose toward the base, the lobes obovate; filaments 

 hairy. 



Canyons and bluffs; Channel Islands (Santa Catalina), southern California. Type locality: Santa Catahna 

 Island, California. April-Sept. St. Catharine's Lace. 



Eriogonum giganteum var. formosum K. Brandg. Erythea 5: 79. 1897. Leaves oblong-lanceolate 

 usually crenately crisped on the margins. San Clemente and Santa Barbara Islands, southern California, ine 

 plants on Santa Barbara Island have the peduncles and involucres densely and permanently white velvety-tomen- 

 tose, and the leaves broadly ovate, more or less cordate at base. 



78. Eriogonum arborescens Greene. Arborescent Eriogonum. Fig. 1426. 



Eriogonum arborescens Greene, Bull. Calif. Acad. 1: 11. 1884. 



Loosely branched shrub, 5-15 dm. high, young twigs tomentose, glabrate in age, and bark of 

 main stems shreddy. Leaves crowded at the ends of the branchlets, linear to linear-oblanceolate, 



