Heliotropium. BORRAGINACE^. 185 



H. phyllostachyum, Torr. Annual, diffusely spreading, strigulose-hirsute: leaves 

 oblong or broadly lanceolate, plane- (3 to 7 lines long), obtuse, contracted abruptly at base 

 into a short petiole, those subtending flowers similar : flowers small, loosely unilateral- 

 spicate along the branches, very short-peduncled, some bractless, others at the axils of 

 leaves : calyx-divisions unequal, lanceolate, in fruit one of them mostly ovate-lanceolate 

 and larger: corolla white, hardly exceeding the calyx, its lobes ovate and the folds at the 

 sinuses sometimes more or less extended into teeth : style very short : nutlets with 2 deep 

 pits. Bot. Mex. Bound. 1. c., in part (1859). II. myosotoides, Chapm. Fl. 330(1860). 

 Rocky hills, southeastern part of Arizona, Wr'tyht. Key West, Florida, Blodyett, Palmer. 

 Flowers barely a line long. Fruiting-calyx becoming 2 lines long, the larger sepal fully 

 twice the length of the depressed-globose fruit. The Mexican specimens of Berlandier 

 referred to this by Dr. Torrey seem rather to belong to //. hispidum, HBK. 



= = Erect, about a foot high : internal appendages of the throat of the corolla prominent and 



derlexed. 



H. polyphyllum, Lehm. Many-stemmed from a ligneous base or root, minutely stri- 

 gulose-cinereous : stems very leafy throughout: leaves linear-oblong or lanceolate, 3 to 7 

 lines long, very short-petioled or sessile : flowers approximate in a leafy slightly scorpioid 

 spike : divisions of the calyx broadly lanceolate or one lanceolate-ovate : tube of the 

 (mostly white) corolla not longer than the calyx, nearly equalling the moderately 5-lobed 

 limb (this 3 or 4 lines in diameter) ; the strong folds of the sinuses produced at base into 

 conical and pouch-like appendages : style short : nutlets 2-pitted on the inner face. Lehm. 

 Asper. 63, & Ic. t. 8; Gray, 1. c. H. glomeratum, A.DC. Prodr. ix. 550? H. bursiferum, 

 C.Wright in Griseb. Cat. Cub. 211. Schleidenia polijplujlla, Fresen. in Fl. Bras. I.e. 

 E. Florida, Buckley, Palmer, &c. (W. Ind. to Brazil.) 



Var. Leavenworthii, Gray, 1. c. Stems a foot or two high, the larger plants de- 

 cidedly shrubby : corolla golden yellow ! //. Leacenworthii, Torr. ined., at least as to the 

 original specimen. Everglades of S. Florida, Leavenworth, Palmer, Garber. Appears to 

 differ only in the yellow color of the corolla, which is remarkable. 



* * Flowers bractless, in distinct unilateral scorpioid spikes, which are commonly in pairs or 

 once or twice forked, forming the scorpioid cyme of this and related orders: anthers free. (Style 

 none and the corolla mainly white in our species.) Euheliotropium, DC., &c. Heliotropium, 

 Fresenius, 1. c. 



-t Pubescent annuals, not fleshy : anthers pointless or mucronulate. 



H. EUROPIUM, L. A foot or so high, cinereous-pubescent, loosely branched : leaves oval 

 or obovate, long-petioled : spikes in pairs or single, becoming slender: flowers small, scent- 

 less : stigma-tip long and slender-subulate, 2-clef t at apex. Waste grounds of Southern 

 and rarely in Northern Atlantic States : nat. from Eu. 



H. inundatum, Swartz. A foot or two high, strigose-cinereous, branching from the 

 base: leaves spatulate-oblong, varying to oblanceolate (commonly an inch long), rather 

 slender-petioled : spikes 2 or 4 in a cluster, filiform, hirsute : flowers very small, crowded 

 (corolla barely a line or so long): stigma thick, surmounted by a short obtuse cone. - 

 Fl. Ind. Occ. i. 343; DC. Prodr. ix. 539. H. procumbens, canescens, & cinereum, HBK. Nov. 

 Gen. & Spec. iii. t. 206. Texas to the frontiers of California (Coulter). (S. Am. & W. 

 Ind.) The stems may become indurated, but the root is annual. 

 -I -i Wholly glabrous perennial (or sometimes annual?), fleshy and glaucous : anthers acuminate. 



H. Curassavicum, L. Diffusely spreading, a span to a foot high : leaves succulent, 

 oblanceolate, varying on the one hand to nearly linear, on the other to obovate (an inch or 

 two long) : spikes mostly in pairs or twice forked, densely flowered : corolla with a rather 

 ample 5-lobed limb (3 lines broad) and open throat (white, with a yellow eye, sometimes 

 changing to blue !) ; the lobes round-ovate, rather shorter than the tube: stigma umbrella- 

 shaped, as wide as the glabrous ovary, flat, not surmounted by a cone! Hook. Bot. Mag. 

 t. 2669. Sandy seashore from Virginia (or farther north as a ballast-weed), and from 

 Oregon southward ; also in the interior, chiefly in saline soils. (Widely distributed over 

 most warmer parts of the world.) 



3. TIAHIDIUM. Fruit at maturity more or less 2-lobed, and separating into 

 2 two-celled and two-seeded (or by abortion one-seeded) carpels, which may at 

 length each split into 2 nutlets, with or without empty cavities or false cells : 



