680 



BOKAGINACEAE (BORAGE FAMILY) 



++ ++ Corolla irregular, limb aDd throat oblique, and lobes unequal, 

 T. Lycopsis. Corolla-tube curved. Stamens included. 



-i- -I- Throat of Corolla open or merely with'folda or crests (not scales). 

 4+ Corolla and Btamens regular. 



8. MyosotiS. Corolla short salver-form, its lobes rounded, and throat crested. Bacemes not 



leafy -bracted (or only exceptionally so at base). 



9. Mertensia. Corolla trumpet- or funnel-shaped, with open or crested throat, usually blue. 



Nutlets fleshy or becoming dry, attached just above the base. 



10. Lithospermum. Corolla salver-form to funnel-form, its rounded lobes spreading ; the throat 



either naked or with low crests. Racemes leafy-bracted. 



11. Onosmodiuin. Corolla tubular, anappendaged, its erect lobes acute. Bacemes leafy-bracted. 



++ ++ Corolla irregular, limb and throat oblique, and lobes unequal. 



12. Echium. Dilated throat of corolla unappendaged. Stamens unequal, exserted. 



849. H. curassavicum. 



1. HELI0TR6PIUM [Tourn.] L. Turnsole. Heliotrope 



Corolla salver-form or funnel-form, unappendaged, more or less plaited in 

 the bud. Anthers nearly sessile. Style short ; stigma conical or capitate. 

 Fruit separating into 2 indurated 2-celled and 2-seeded closed carpels, or more 

 commonly into 4 one-seeded nutlets. — Herbs or low shrubby plants; leaves 

 entire ; fl. in summer. (The ancient name, from fjXios, the sun, and TpoTr-q, a 

 turn, with reference to its flowering at the summer solstice.) 



§ 1. EUHELI0TR6pIUM Griseb. Fruit i-lobed, separating into four 1-celled 

 l-seeded nutlets ; style short. 



* Flowers in hractless one-sided seorpioid spikes. 



1. H. EnKOPAi:DM L. Erect annual, 1.5-8 dm. high, 

 hoary-pubescent ; leaves oval, long-petioled ; lateral spikes 

 single, the terminal in pairs ; calyx spreading in fruit, 

 hairy; corolla ■white, rarely 4 mm. broad. — Waste and 

 ballast ground, Mass. to D. C. and Fla. (Adv. from Eu.) 



2. H. curassivicum L. (Seaside H.) Apparently 

 annual, glabrous,; stems ascending ; leaves lance-linear 

 or spatulate, thickish, pale, almost veinless ; spikes in 

 pairs ; flowers white or bluish. — Sandy seashores and salt 



marshes, from Del. southw. ; saline soils, s. lU., southw. 

 and westw. ; ballast and waste places near the coast, 

 locally northw. to Me. Fig. 849. 



* * Inflorescence not at all seorpi- 

 oid ; flowers scattered. 



3. H. ten^llum (Nutt.) Torr. 

 Stem 1.5-4 dm. high, paniculately 

 branched, slender, strigose-can- 

 escent ; leaves narrowly linear, 

 with revolute margins ; flowers 

 white, often bractless. — Open 

 dry ground, Ky. to Kan., and 

 southw. Fig. 850. 850. H. teneUam. 



§ 2. TIARfDIUM (Lehm.) Gray. Fruit 2-lobed, sepa- 

 rating into two 2-celled 2-seeded carpels, with some- 

 times a pair of empty false cells; style very short; 

 flowers in bractless seorpioid spikes. 



4. H. fNDicnM L. Erect and hairy annual ; leaves petioled, ovate or oval and 

 somewhat heart-shaped ; spikes single ; corolla blue ; fruit 2-c!eft, miter-shaped, 

 with an empty false cell before each seed-bearing cell. — Waste places, Ky. to Ind., 

 Mo., and southw. ; also on ballast northw. (Adv. from India.) Fig. 851, 



H. tndicum. 



