200 BORAGINACEAE 



Calyx-lobes ovate-lanceolate; inflorescence open. 32. M. viridis. 



Calyx-lobes narrowly lanceolate; inflorescence dense. 



Leaves narrowly linear. 33. M. lineariloba. 



Leaves oblong-lanceolate to ovate. 



Stem-leaves ovate to lance-ovate, finely strigose above; coroUa-Urab 



and throat decidedly shorter than the tube. 34. M. ovala. 

 Stem-leaves oblong-lanceolate; corolla-limb and throat nearly equalling 

 the tube. 

 Leaf-blades scabrous-hispidulous or merely pustulate above; stem 



2-4 dm. high. 35. M. coronata. 



Leaf-blades Wspidulous-strigose above; stem rarely more than 2 

 dm. high. 36. M. Parryi. 



Pedicels and calyx glabrous, except the ciUate lobes of the latter. 



Calyx-lobes ovate-lanceolate; upper stem-leaves ovate. 37. M. Drummondii. 



Calyx-lobes narrowly lanceolate; stem-leaves linear or oblong. 



Upper surface of the leaves short-pubescent. 38. M. linearis. 



Upper surface of the leaves not hairy. 39. M. lanceolala. 



VI. Bbachylobae. 

 Calyx-lobes ciliate on the margins. 40. ^f. brachyloba. 



Calyx-lobes not ciUate on the margins. 41. M. campanulata. 



VII. Alpinae. 



Calyx cihate on the margins; inflorescence narrow. 

 Leaves short-strigose above, glabrous beneath. 



CoroUa 7-9 mm. long; plant depressed, decumbent or ascending, 1-2 dm. high. 

 Calyx-lobes obtuse. 42. M. alpina. 



Calyx-lobes acute. 43. M. Tweedyi. 



Corolla more than 10 mm. long; stem about 3 dm. high. 44. M. perplexa. 

 Leaves merely pustulate-punctate above. 45. M. humilis. 



Calvx villous all over. 



Leaves oblong or oblanceolate, glabrous beneath; inflorescence open. 



46. M. brevistyla. 

 Leaves lineal, densely hairy on both sides; inflorescence narrow. 47. M. cana. 



VIII. INXONGKUEN'TES. 



One species. 48. M. incongruens. 



15. MYOSOTIS (Rupp.) L. Fobget-mb-not. 



Perennials, tufted; corolla 4-6 mm. wide. 1. M. alpestris. 



Annuals ; corolla less than 2 mm. wide. 



Stem tall, 3-5 dm. high ; calyx nodding in fruit, 5-7 mm. long ; nutlets about 2 mm. 

 long. 2. M. macrosperma. 



Stem lower, 1.5-3 dm. high; calyx not nodding in fruiting, less than 5 mm. long; nut- 

 lets about 1.5 mm. long. 3. M. tirginica. 



16. LITHOSPERMUM (Tourn.) L. Gbomwell, Puccoon, 



Indian Paint. 



Annuals; nutlets dull, brownish, coarsely wrinkled and pitted. 1. L. artense. 



Perennials, with thick taproots ; nutlets white and shining. 



Corolla-lobes neither fimbriate nor toothed; flowers all well developed. 



Corolla greenish or pale yellow, 1 cm. or less long; crest in the throat obsolete; 

 plant very leafy, with the flowers mostly on the short branches. 

 Corolla-limb 3-5 mm. wide; tube not longer than the calyx; stem grajish 



strigose, but scarcely hispid. 2. L. Torreyi. 



Corolla-Umb 5-8 mm. wide; tube longer than the calyx. 



Leaves linear or narrowly linear-laaceolate; stem very hispid; plant canes- 

 cent. 3. L. ruderale. 

 Leaves lanceolate, long-attenuate; stem scarcely hispid; plant green. 



4. L. lanceolatum. 

 Corolla bright yellow or orange, more than 1 cm. long; crest in the throat prom- 

 inent. 

 Floral leaves of the later flowers small, shorter than the flowers; limb of the 



corolla 6-8 mm. wide. 5. L. multifiorum. 



Floral leaves of the later flowers not reduced ; limb of the corolla 8-20 mm. 

 wide. 

 Hispid-pubescent; corolla-tube bearded at the base within. 



6. L. GTtielini. 

 Canescent; corolla-tube not bearded at the base within. 7. L. canescens. 

 Corolla^lobes of the early flowers fimbriate or dentate; later flowers cleistogamous. 

 Corolla of the early flowers 2.5-3 cm. Crarely only 2 cm.) long; lobes distinctly 

 fimbriate. 

 Plant hirsute. S. L. asperum. 



Plant appressed-canescent. 



Leaves narrowly linear. 9. L. HnearifoKum. 



Leaves spatulate to linear-oblong. 10. L. oblongum. 



Corolla of the early flowers 2 cm. or less long ; lobes dentate. 



Corolla 15-20 mm. long; limb 8-10 mm. wide; stem low, ascending or de- 

 cumbent. 11. L. mandanense. 

 Corolla 10 mm. or less long; limb 6-8 mm. wide; stem strict, 2^ dm. high, 

 mostly simple, or with erect branches. 12. L. breviflorum. 



