BORRAGINACE^E. (BORAGE FAMILY.) 361 



Tribe II. BOBBAGINE^E. Ovary deeply 4-parted, forming as many separate 1- 

 seeded nutlets in fruit ; style rising from the centre between them. 



* Corolla and stamens regular. 

 - Nutlets armed, attached laterally ; corolla short, closed by 5 scales. 



2. Cynoglossum. Nutlets horizontally radiate, much produced downward, covered 



with barbed prickles. 



3. Echinospermum. Nutlets erect or ascending, the margin or back armed with 



barbed prickles. 



- H- Nutlets not armed, attached more or less laterally. 



4. Krynit zkia. Corolla short, white, with closed throat. Nutlets attached along the 



inner angle. 



5. Mertensia. Corolla trumpet-shaped with open throat, usually blue. Nutlets fleshy, 



attached just above the base. 

 - H- - Nutlets unarmed, attached by the very base, ovoid, mostly smooth and shining. 



+ Scar flat, small. Racemes leafy-bracteate, except in n. 6. 

 0. Myosotis. Corolla short salver-form, its lobes rounded, and throat crested. 



7. Ldthospermum. Corolla salver-form to funnel-form, its rounded lobes spreading ; 



the throat either naked or with low crests. 



8. Onosmodium. Corolla tubular, unappendaged, its erect lobes acute. 



H- -H- Scar large and excavated. 



9. Symphytum. Corolla oblong-tubular, enlarged above and closed by 5 scales. 



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



10. Lycopsis. Corolla- tube curved, closed with hispid scales. Stamens included. 



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



pROctJMBENS, L., a European annual, well marked by its much 

 enlarged membranaceous and veiny fructiferous calyx, has sparingly appeared 

 in waste grounds about New York and Philadelphia, and at Pipestone, Minn. 



1. HELIOTBOPIUM, Tourn. TOURNSOLE, 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 2 - 4-lobed, separating into 2 indurated 2-celled and 2-seeded closed car- 

 pels, or more commonly into 4 one-seeded nutlets. Herbs or low shrubby 

 plants; leaves entire; fl. in summer, white (in our species). (The ancient 

 name, from %\tos, the sun, and rpoir'fi, a turn, with reference to its flowering at 

 the summer solstice.) 

 1. HELIOTROPIUM proper. Fruit 4-lobed, separating into four l-celled 



l-seeded nutlets. Style short. 

 * Flowers in bractless one-sided scorpioid spikes. 



H. EUROPIUM, L. Erect annual (6-18' high), hoary-pubescent; leaves 

 oval, long-petioled ; lateral spikes single, the terminal in pairs ; calyx spread- 

 ing in fruit, hairy. Waste places, southward ; scarce. (Adv. from Eu.) 



1. H. Curassavicum, L. Apparently annual, glabrous ; stems ascend- 

 ing ; leaves lance-linear or spatulate, thickish, pale, almost veinless ; spikes in 

 pairs. Sandy seashore, Va. ; saline soils, S. 111., and south and westward. 



* * Inflorescence not at all scorpioid ; flowers scattered. 



2. H. ten&lum, Torr. A span to a foot high, paniculately branched, 

 slender, strigose-canescent ; leaves narrowly linear, with revolute margins ; 

 flowers often bractless. Open dry ground, Ky. to Mo. and Kan., south to 

 Ala. and Tex. 



