BORA G IX A CEA E. 767 



Nutlets attached to the receptacle by their very bases. 

 Scar of attachment small, flat. 



Corolla salverform or funnelform, its lobes rounded, spreading. 

 Racemes not bracted ; corolla-tube short. 10. Myosotis. 



Racemes bracted; corolla-tube cylindric, usually slender. 



11. Lithospermum. 

 Corolla tubular, its lobes erect, acute. 12. Onosmodium. 



Scar of attachment large, concave. 



Corolla tubular, 5-toothed. 13. Symphytum. 



Corolla rotate; anthers erect in a cone. 14. Borago. 



Flowers irregular. 



Stamens included; throat of the corolla closed by scales. 15. Lycopsis, 



Stamens exserted; throat of the corolla dilated, open. 16. Echium. 



1. HELIOTROPIUM L. 



Herbs or shrubs, with alternate mostly entire leaves, and small blue or white 

 flowers, in scorpioid spikes, or scattered. Calyx-lobes or -segments lanceolate or 

 linear. Corolla salverform or funnelform, naked in the throat, its tube cylindric, 

 its lobes imbricated, plicate or induplicate in the bud. Stamens included; fila- 

 ments short, or none. Stigma conic or annular. Fruit 2-4-lobed, separating into 

 4 i-seeded nutlets, or into 2 2-seeded carpels. [Greek, sun-turning, i. e., turning 

 to or with the sun.] About 1 15 species, widely distributed. Besides the follow- 

 ing, some 9 others occur in southern and western N. Am. 



Fruit 4-lobed, each lobe becoming a i-seeded nutlet. 

 Flowers in scorpioid spikes. 



Plant rough-puberulent; leaves oval. I. H. Europaeum. 



Glabrous, fleshy; leaves linear or spatulate. 2. H. Curassavicum. 



Flowers solitary, terminating short branches. 3. H. tenellum. 



Fruit 2-lobed, or of 2 carpels. 



Style elongated ; flowers large, scattered, white. 4. H. convolvulaceum. 



Style very short; flowers blue, in scorpioid spikes. 5. H. Indicum. 



i. Heliotropium Europaeum L. European Heliotrope. (I. F. f. 3014.) 

 Annual, much branched, rough puberulent, 1.5-5 dm. high. Leaves oval, 2-5 cm. 

 long, obtuse, narrowed at the base, slender- petioled; flowers white, 2-4 mm. broad, 

 in dense I -sided, bractless spikes; terminal spikes in pairs, the lateral ones com- 

 monly solitary ; calyx-segments shorter than the corolla-tube ; anthers distinct, 

 obtuse; stigma-tip long-conic; fruit depressed-globose, pubescent. In waste places, 

 N. Y. and Penn. to Fla. Adventive or nat. from Europe. June-Oct. 



2. Heliotropium Curassavicum L. Sea-side Heliotrope. (I. F. f. 3015.) 

 Annual (or southward perennial ?), fleshy, more or less glaucous, diffuse, the 

 branches 1.5-4.5 dm. long. Leaves oblanceolate. linear, or spatulate. entire, in- 

 conspicuously veined, 2-5 cm. long, 3-6 mm. wide, obtuse, narrowed into petioles, 

 or the upper sessile; scorpioid spikes dense, bractless. mostly in pairs; flowers 

 about 4 mm. broad; calyx-segments acute; corolla white with a yellow eye or 

 changing to blue; stigma umbrella-shaped; anthers acuminate; fruit globose. On 

 sandy seashores, Va. to Tex. and Mex. 



2a. Heliotropium spathulatum Rydb. Flowers much larger than in the 

 preceding species, the corolla 6-8 mm. broad ; stem stout, ascending ; leaves 

 broadlv spatulate. Saline soil, N. D. to Wash., Iowa, Nebr. and Utah. 



3. Heliotropium tendllum (Xutt.) Torr. Slender Heliotrope. (I. F. f. 

 3016.) Annual, strigose-canescent; stem commonly leafless below, 1.5-4.5 dm. 

 high. Leaves linear, entire. 1-4 cm. long, narrowed at both ends, sessile, or the 

 lower petioled; flowers white, about 5 mm. long, bracted by I or 2 leaves; calyx- 

 segments unequal; corolla-tube canescent, its lobes entire; anthers obtuse; stigma 

 subulate-tipped; fruit depressed, strigose-pubescent. In dry soil, Ky. to Kans., 

 Ala.. Tex. and X. Mex. April-Aug. 



4. Heliotropium convolvulaceum (Xutt.) A. Gray. Bindweed Heliotrope. 

 (I. F. f. 3017.) Annual, strigose-canescent, 1.5-4 dm. high. Leaves oblong, 

 ovate, or lanceolate, entire, short-petioled. narrowed at the base. 1-4 cm. long; 

 flowers numerous, fragrant, short-peduncled. mostly solitary and opposite the leaves ; 

 calyx-segments acuminate, equal; corolla white, strigose, 1.5-2 cm. long, about 12 



