300 



BORAGINACEAE 



Refs. — EuPLOCA ALBirLORA Jtn., Contrib. Gray Herb. 70:53 (1924); Jepson, Man. 836 

 (1925). Batschia albifiora Eaf., New Fl. N. Am. pt. 4:19 (1836), type loc. Arkansas Elver. 

 E. convolvulacea Nutt., Trans. Am. Phil. Soc. ser. 2, 5 :190 (1837), type loc. "banks of Arkansas." 

 Heliotropium convolvulaccum Gray, Mem. Am. Acad. ser. 2, 6:403 (1857). Var. californica 

 Jepson & Hoover. Heliotropium californicum Greene, Bull. Cal. Acad. 1:202 (1885), type loc. 

 Amboy, Mohave Desert, Curran. H. convolvulaeeum var. californicum Jtn., Contrib. Arn. Arb. 

 3:83 (1932). 



2. HELIOTROPIUM L. Heliotrope 



Ours herbs with alternate mostly entire leaves. Flowers white, iu dense scor- 

 pioid spikes. Calyx-segments lanceolate or linear. Corolla salverform, short, with 



open throat ; sinuses more or less plaited in 

 the bud. Stamens included ; anthers acumi- 

 nate, distinct, nearly sessile. Style (in ours) 

 none, the stigma turned downward over sum- 

 mit of ovary and thus resembling a skull-cap. 

 Ovary not lobed (but slightly 4-ereased lon- 

 gitudinally), separating when ripe into 4 one- 

 seeded closed nutlets. — Species about 200, all 

 continents. (Greek, helios, sun, and trope, a 

 turning, "The flowers beginning to appear at 

 the summer solstice.") 



Fig. 410. Heliotropium cukassavi- 

 CUM L. a, fl. branchlet, X 1 ; 6, corolla 

 spread open, X 5; c, ovary crowned by 

 the cap-like stigma, X 10. 



1. H. curassavicum L. Chinese Pus- 

 ley. (Fig. 410.) Stems branching, Yo to 3 

 feet long, prostrate, from a perennial root ; 

 herbage glabrous, glaucous, fleshy; leaf -blades 

 obovate to broadly oblanceolate ; spikes mostly 

 in pairs (sometimes 3 or 4) ; corolla china- 

 white with the j'ellow e.ye changing to purple, 

 IVo to 3 lines long; stigma not hairy. 



Marshes, stream beds and alkaline flats or 

 plains, often associated with Distichlis spi- 

 eata, 10 to 4800 (or 6750) feet: throughout 

 California. North to "Washington, east to 

 Virginia. Maritime over warmer parts of the 

 earth. Apr.-Aug. 



Note on the flower. — The white corolla soon be- 

 comes purplish, especially in the center (throat). The 

 anthers are produced into acuminate tips which valvately close the entrance to the corolla-tube 

 in early anthesis. After dehiscence of the anther-cells, the anthers spread and become lanceolate 

 with recurved tips. 



Locs. — Coastal S. Cal.: San Diego, Falmer 255; Escondido, C. V. Meyer 452; Temeseal Ca- 

 non, Riverside Co., Jepson; Newport, Orange Co., Alice King; San Bernardino Valley, Parish 

 318 ; Los Angeles, E. D. Palmer; Los Sauces Creek, Ventura coast, Jepson 20,167 ; Lompoc, Santa 

 Barbara Co., Jos. Boward. Transmontane deserts, S. Cal.: Vallecito, e. San Diego Co., Jepson; 

 Needles, Jones 3866; Barstow, Jepson. Coast Ranges; Los Osos Valley near San Luis Obispo, 

 Jepson; Pt. Piiios, Monterey Co., Heller 8408 ; Alviso, Santa Clara Co., Jepson 9824 ; betw. Salada 

 and Mussel Rock, San Mateo Co., Newlon 247 ; West Berkeley, Bioletti ; Devil's Gate, Putah Pass, 

 Jepson; Middletown (6 mi. e.). Lake Co., M. S. Baker 2318a ; Geyserville, Sonoma Co., M. S. Baher 

 440 ; Stone Lagoon, Humboldt coast, Tracy 14,747. Great Valley : Bakerstield, Davy 1772 ; Selma, 

 H. P. Eclley ; Kcrman, Fresno Co., Jepson; Stockton, Davy 410b; Vacaville, Jepson 2368; Rose- 

 ville. Placer Co., E. E. Arp ; Orland, Glenn Co., Jepson 12,254; Salt Creek, w. Tehama Co., Jepson. 

 Sierra Nevada, east side: Funeral Mts., near Furnace Creek ranch, Jepson; Burdick grade, Inyo 

 Co., Almcda NordyTce; Walker Lake, Shoclcley 437 ; Goose Lake, Modoc Co., Austin # Bruce 2271 ; 

 Montague, Siskiyou Co., Butler 942. 



Refs. — Heliotropium curassavicum L., Sp. PI. 130 (1753), type American; Jepson, Fl. W. 

 Mid. Cal. 441 (1901), ed. 2, 344 (1911), Man. 937 (1925). E. chenopodioides Willd., Enum. 

 Hort. Berol. 175 (1809), type loc. Pacific shores of middle America. H. .xerophihim Ckll., Bot. 

 Gaz. 33:379 (1902), type loc. Albuquerque, N. Mex. H. curassavicum var. xerophilum Nels. & 



