290 BORAGINACEAE. 



Plant tall, usually over 4 dm. high; leaves distinctly veined, in most 

 feather-veined, but in a few triple-veined with anastomosing veins. 



MEMBRANACEAE. 



Plant low, usually less than 4 dm. high; leaves with a strong midrib, 

 without distinct lateral veins (except sometimes the basal leaves, which 

 then, however, are thick and firm). LANCEOLATAE. 



Anthers subsessile or on very short narrow filaments inserted in the tube or the 

 throat of the corolla ; low plants, 1-3 dm. high, of the habit of the lanceolata 

 group. ALPINAE. 



BRACHYLOBAE. 

 One species. i. M. brachyloba. 



ClLIATAE. 



Corolla 9-12 mm. long; limb not longer than the tube. 



Sepals thickened and pale on the back. 2. M. picta. 



Sepals neither thickened nor pale on the back. 3. M. ciliata. 



Corolla 12-15 mm. long; limb longer than the tube. 

 Sepals oblong, 1.5-2 mm. long. 

 Leaves dark green, rough with large muricate points ; pedicels with larger 



white murication. 4- M. punctata. 



Leaves more glaucous, smooth or with minute callous murication ; pedicels 



almost smooth. 5- M. polyphylla. 



Sepals linear, 3 mm. long. 6. M. platensis. 



MEMBRANACEAE. 



Corolla i cm. or less long. 



Corolla-tube over 4 mm. wide ; calyx bristly-ciliate. 7. M. cynoglossoides. 



Corolla-tube 2-3 mm. wide. 



Plant stout ; pedicels bristly hispid with spreading hairs. 



8. M. muriculata. 

 Plant slender; pedicels strigose. 15- M. viridula. 



Corolla about 1.5 cm. long. 



Calyx not white-hairy, about half as long as the tube of the white corolla. 



9. M. alba. 



Calyx densely white-hairy, especially near the margins of the lobes, y$ as long 

 as the blue corolla. 10. M. pratensis. 



LANCEOLATAE. 



Pedicels distinctly strigose or hirsute. 



Calyx and pedicels densely pubescent all over. 



Stems from a more or less woody caudex or rootstock ; leaves pubescent on 



both sides. 



Leaf-blades linear or only the uppermost lanceolate, n. M. lateriflora. 

 Blades of the basal leaves ovate, lanceolate or spatulate. 



Plant more or less grayish and densely pubescent throughout, especially 



on the calyx. 12. M. Bakeri. 



Plant green ; pubescence long and loose, even on the stem. 



13. M. myosotifolia. 

 Stems from a fusiform root ; leaves glabrous beneath. 



14. M. fusiformis. 

 Calyx externally glabrous except on the ciliate margins, and sometimes on the 



midveins and angles. 

 Leaves glabrous beneath. 



Calyx-lobes ovate-lanceolate; inflorescence open. 15. M. viridula. 

 Calyx-lobes narrowly or linear-lanceolate ; inflorescence dense. 



Leaves narrowly linear. 16. M. lineariloba. 



Leaves oblong, lanceolate to ovate. 



Stem-leaves lanceolate or oblanceolate ; corolla-limb about equalling 



the tube. 17. M. Partyi. 



Stem-leaves ovate to ovate-lanceolate ; corolla-limb shorter than the 



tube. 1 8. M. ovata. 



Leaves hairy on both sides. 



