230 54. BORAGINACEJE. 



10. MERTENSIA Roth. 



1. M. maritima (Don); st. procumbent branched, 1. ovate 

 acute rough with callous dots glabrous fleshy glaucous, nuts 

 smooth. Lithospermum Sm., E. B. 361. Stenhammaria Fr. 

 Fl. in racemes, purplish-blue. Protuberances in throat of cor. 

 yellow. L. tasting like Oysters. Nuts free, forming a pyramid, 

 exceeding the calyx. Pericarp membranous ; seed smaller than 

 the cavity. Northern sea-shores. P. V. VIII. 



11. LITHOSPERMUM Linn. Gromwell. 



1. L. officinale (L.); st. erect much branched, 1. lanceolate 

 acute veined hispid with bulbous adpressed bristles above hairy 

 beneath, throat of the cor. with a crown of scales, nuts smooth. 

 E. B. 134. Fl. greenish-yellow. Nuts gray, highly polished, 

 stony, 2 or 3 ripening in each calyx. Root whitish. Dry and 

 stony places, especially on limestone. P. VI. VIII. Gromwell. 



2. L. purpureo-cceruleum (L.); barren st. prostrate creeping, 

 the others erect 2 3-fid above, 1. lanceolate acute hispid, hairs 

 on the upper side adpressed bulbous, cor. much exceeding the 

 calyx, nuts smooth. E. B. ll/. Fl. large, bright blue. Nuts 

 " silvery-white, highly polished, slightly rugged," rarely pro- 

 duced. This species and the following have no scales in the 

 throat of the cor., but merely 5 longitudinal downy folds, and 

 belong to the genus Rhytispermum Link, Spenn. Thickets on 

 a limestone soil, rare. P. V. VII. E. 



3. L. arvense (L.) ; st. erect branched, 1. lanceolate rather 

 acute hispid with adpressed bulbous hairs on both sides, cor. 

 rather exceeding the calyx, nuts tubercular. E. B. 123. Fl. 

 small, white. Nuts pale brown, polished, wrinkled, pitted, 3 or 

 4 perfected in each calyx. Root bright red, colouring paper. 

 Corn-fields. A. V. VII. Corn Gromwell. 



12. MYOSOTIS Linn. Scorpion-grass, 

 i. Persistentes Col. of fruit shorter than its stalk. 



1. M. palustris (With.) ; fr.-cal. open with straight adpressed 

 bristles, teeth short triangular, cor.-limb flat longer than the 

 tube, lobes slightly emarginate, style about equalling cal., pubes- 

 cence of st. spreading. E. B. 1973. St. 42. 2. L. bluntish, api- 

 culate. St. angular owing to the prominent decurrent lines from 

 the margins of the leaves. Clusters quite leafless. Cor. large, 

 bright blue with a yellow eye. Cal. divided about down. 

 |3. M. strigulosa (R.) ; slenderer, more erect, pubescence of st. 

 adpressed, 1. less blunt, cal.-teeth rather longer. St. 42. 3. Base 



