BORRAOIXACEJE. 153 



* * Nuiltt* fixed to a prominent base (gynobase) by gome part of the inner angle or /own: 



corolla imbricated. 

 Nutlets not armed with prickles, not appendaged. 



Corolla blue or whitish: smooth glaucous perennials. 4 



Corolla yellow: hispid annuals 6 



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-lobed crests. 



Racemes bract eat e at base: nutlets erect, prickles barbed 



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. HELIOTBOPIUM, Tournefort. 



1. H. Curassavicum, L. Nearly or quite prostrate: corolla bluish or white. 



2, LITHOSPERMUM, Tournefort 



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



2. I*, pilosum, Nntt. Corolla greenish yellow, silky, 5 or 6 lines long. 



3. MTTOSOTIS, Linnaeus. 



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. MEBTENSIA, Roth. 



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



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



6. AMSINCKIA, Lehmann. 



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



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



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



1. A. vernicosa, H. & A. Sparingly hispid: corolla-tube a little exserted. 

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



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



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



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



