88 BORRAGINACE2B. 



* * Nutlets fixed to a prominent base (gynobase) by some part of the inner angle or faces 



corolla imbricated. 

 Nutlets not armed with prickles, not appendaged. 



Corolla blue or whitish: smooth glaucous perennials. ' ....... 4 



Corolla yellow: hispid annuals 5 



Corolla white, mostly yellow-crested in the throat: hirsute or hispid. 



Nutlets erect and straight: calyx in fruit not rotate 6 



Nutlets oblique or incurved on a rounded base 7 



Corolla blue, rotate: a dwarf alpine tufted perennial ....... 8 



Nutlets armed with hooked or barbed prickles, or flat and wing-margined. 

 Corolla blue, purple or white; throat with a ring of 2-iobed crests. 



Racemes bracteate at base: nutlets erect, prickles barbed. 9 



Racemes on naked peduncles: nutlets globose ........ 10 



Corolla minute, white: flowers scattered along leafy branches. 



Nutlets flattened, forming an x-shaped or star-like bur. .-.. 11 



1. HELIOTROPIUM, Tourncfort. 

 *>!. H. Curassavicum, L. Nearly or quite prostrate: corolla bluish or white. 



2. LITHOSPER3MCUM, Tournefort. 



1. L. Calif ornicum, Gr. Corolla 9 or 10 lines long: throat exceeding lobes. 



2. L. pilosum, Nutt. Corolla greenish yellow, silky, 5 or C lines long. 



3. MYOSOTIS, Linnams. 



1. M. verna, Nutt. Hispid calyx unequal: corolla white, small. Oregon. 



2. M. sylvatica, Iloffm. var. alpestris, Koch. Corolla blue, 3 or 4 lines broad. 



4. MERTEttSIA, Roth. 



1. M. maritima, Don. Corolla 3 or 4 lines long, tube shorter than calyx, 



2. M. Siborica, Don. Corolla- tube much exserted: calyx lobes obtuse. 



5. AMSINCZIA, Lehmann. 



Nutlets sharply 3-angled, straight, smooth, shining ,. . 1 



Nutlets broad; tho back nearly flat, wavy-wrinkled cross-wise ^, 2 



Nutlets incurved, convex and ridged on the back, rough 3, 4, 5 



1. A. vemicosa, II. ,& A. Sparingly hispid: corolla-tube a little exserted. 

 Var. grandiflora, Gr. Very bristly-hispid: corolla-tube longer, limb broader. 



2. A. tessellata, Gr. Coarsely hispid: leaves mostly obtuse: calyx rusty. 



3. A. intermedia, F. & M. Calyx whitish or tawny hispid: corolla 2 or 3 line*. 



4. A. spectabilis, F. & M. Corolla bright orange much exserted. 



