88 BORRAGINACESR. 
* © Nutlets sixed to @ prominent base (gynobase) by some part of the inner angle or face: 
corolla imbricated. 
Nutlets not armed with prickles, not appendaged. 
Corolla blue or whitish: smooth glaucous perennials....... sbeceswweeceaesinees & 
Corolla yellow: hispid annuals........... A EE 
Corolla white, mostly yellow-crested in the throat: hirsute or hispid. 
Nutlets erect and straight: calyx in fruit not rotate..... .......s0.220. @ 
Nutlets oblique or incurved on a rounded base...... Suigibleeteiciiens sieeidee 
Corolla blue, rotate: a dwarf alpine tufted perennial..............+ o cece nne- 8 
Nutlets armed with hooked or barbed prickles, or flat and wing-margined. 
Corolla blue, purple or white; throat with a ring of 2-lobed crests. 
Racemes bracteate at base: nutlets erect, prickles barbed..... eicarpareleaint 9 
Racemes on naked peduncles: nutlets globose........ 2... cee ceee eee . 10 
Corolla minute, white: flowers scattered along leafy branches. 
Nutlets flattened, forming an x-shaped or star-like bur........... voces LI 
a] 
1. HELIOTROPIUM, Tournefort. 
1, HL. Curassavicum, L. Nearly or quite prostrate: corolla bluish or white. 
2. LITHOSPERMUM, Tournefort. 
1. L. Californicum, Gr. Corolla 9 or 10 lines long: throat exceeding lobes. 
2. L. pilosum, Nutt. Corolla greenish yellow, silky, 5 or 6 lines long. 
3. MYOSOTIS, Linneus. 
1. M. verna, Nutt. Hispid calyx unequal: corolla white, small. Oregon. 
2. M. sylvatica, Hoffm. var. alpestris, Koch. Corolla blue, 3 or 4 lines broad. 
4. MERTENSIA, Roth. 
M. maritima, Don. Corolla 3 or 4 lines long, tube shorter than calyx. 
2. ML. Siberica, Don. Corolla-tube much exserted: calyx lobes obtuse. 
ae 
5. AMSINCKIA, Lehmann. 
Nutlets sharply 3-angled, straight, smooth, shining....... ......eesseee Eeeees sea 2 
Nutlets broad; the back nearly flat, wavy-wrinkled cross-Wise..........0022 sescesne B 
Nutlets incurved, convex and ridged on the back, rough......-......0..00. . 3, 4 & 
1. A. vernicosa, H. & A. Sparingly hispid: corolla-tube a little exserted. 
Var. grandifiora, Gr. Vcry bristly-hispid: corolla-tube longer, limb broader. 
2 & tessellata, Gr. Coarsely hispid: leaves mostly obtuse: calyx rusty. 
3. A. intermedia, F. & M. Calyx whitish or tawny hispid: corolla 2 or 3 lines, 
4, A. spectabilis, F.& M. Corolla bright orange much exserted. 
