792 



BORAGINACEAE 



Mertensia 



50 



Map 1711 



Lithospermum arvense L. 



4. Myosotis micrantha Pall. Map 1709. Found in a white oak woods 

 pasture in Lagrange County, common in blue grass along Eel River at 

 Cataract Falls in Owen County, and a common weed in Turkey Run State 

 Park about the Administration Building. 



Nat. of Eu. ; now established in N. H., Mass., N. Y., N. J., Ohio, Mich., 

 Ont., and Ind. 



7102. MERTENSIA Roth Bluebell 



1. Mertensia virginica (L.) Link. (Mertensia virginica (L.) DC.) 

 (Williams. A monograph of the genus Mertensia in North America. Ann. 

 Missouri Bot. Gard. 24: 17-159. 16 fig. 1937.) Virginia Bluebell. 

 Map 1710. Local throughout the area indicated on our map but usually 

 frequent to abundant where it is found. All but three of our specimens 

 are from wooded flood plains and wooded terraces of streams. These three 

 are from rather sandy woods. I have seen it also as a common plant on a 

 rocky, wooded hillside about three miles southeast of Dillsboro, Dearborn 

 County. This species does well in cultivation but prefers partial shade. 



N. Y., Ont. and Minn., southw. to Ala. and Kans. 



7109. LITHOSPERMUM [Tourn.] L. Cromwell 



Flowers less than 10 mm long. 



Corolla white or nearly so, without crests in the throat, lobes glabrous without; 



nutlets gray, dull, wrinkled, and roughened 1. L. arvense. 



Corolla greenish white or yellow, with crests in the throat, lobes pubescent with- 

 out; nutlets ivory white, glossy, smooth, more or less impressed-punctate. 

 Leaves lanceolate, firm, acute, veins obscure beneath; corolla greenish white; 

 nutlets about 3 mm long. (See excluded species no. 519, p. 1083) . .L. officinale. 

 Leaves ovate to ovate-lanceolate, thin, acuminate, veins prominent beneath; corolla 



yellow; nutlets about 4 mm long 2. L. latifolium. 



Flowers more than 10 mm long. 



Leaves narrowly linear, acute, appressed canescent-pubescent; corolla light yellow, 

 tube 15-33 mm long, lobes more or less fimbriate or erose, with well developed 

 crests in the throat of the corolla 3. L. incisum. 



