476 BORAGINACEA£ COLDENIA 
12 Cryptanthe Mostly slender annuals with alternate leaves and small 
flowers on slender deciduous pedicels; nutlets attached from the base 
upward to a pyramidal gynobase. 
18 Amsineckia Coarse annua!s with alternate leaves and yellow flowers: 
nutlets attached below the middle to an oblong pyramidal gynobase. 
14 Mertensia Perennial herbs with alternate leaves and blue or white 
flowers on slender persistent pedicels: nutlets attached near the base 
‘to a convex gynobase, wrinkled when mature and dry. 
15 Pneumaria Maritime fleshy branching herbs with alternate leaves 
and blue to nearly white flowers: nutlets attached just above their 
bases to a somewhat elevated gynobase, fleshy, smooth and shining 
when mature. 
= = Nutlets sessile, attached by the very base to a plain gynobase. 
16 Myosotis Annual or perennial herbs with white or blue flowers in 
bractless racemes: nutlets thin-crustaceous, smooth. 
17 Lithospermum Perennial or annual herbs with white or yellow 
flowers in bracted racemes: nutlets bony. . 
Tribe 1 Ehretiex DC. Prodr. ix, 602. Herbs shrubs or trees. 
Style once bifid or two-parted. Stigmas more or less capitate. Co- 
tyledons plain. | 
1 COLDENIA L. Gen. n. 173. 
Low herbaceous or suffrutescent plants with entire leaves and 
numerous small white sessile flowers usually in clusters. Calyx 
5-parted, or in the original species 4-parted, the divisions narrow. 
Corolla short-funnelform or nearly salverform, seldom much sur- 
passing the calyx, the lobes rounded, imbricated or sometimes 
partly convolute in the bud. Stamens included. Style 2-cleft - 
or 2-parted. Stigmas more or less capitate. Ovary entire or 
laterally 4-lobed, 4-celled. Ovules anatropous, pendulous. Fruit 
dry, separating at maturity into 4 one-seeded nutlets, or by abor- 
tion fewer. Seeds without albumen. 
C. Nuttallii Hook. Kew Journ. Bot. iii, 296. Canescently pubescent 
and sparsely hispid prostrate annual, repeatedly and divergently dichoto- 
mous: leaves ovate or rhomboid-rotund, 2-4 lines long, on petioles longer 
than the blade, with 2 or at most 3 pairs of strong and somewhat curving 
veins, the margins somewhat revolute: flowers densely clustered in the 
forks and at the ends of the naked branches: calyx-lobes linear, sparsely 
hispid, equalling the tube of the pink or white corolla: filaments shorter 
than the anthers, inserted nearly in the throat of the corolla; the tube of 
which bears 5 short obtuse scales near the base: fruit deeply 4-lobed ; the 
thin-walled nutlets rounded and united only at the centre, smooth and 
shining, oblong-ovate, marked with a linear and raphe-like ventral scar: 
embryo straight: cotyledons very deeply horseshve-form, their elongated 
bases almost enclosing the radical. Arid plains, eastern Washington to 
California, Utah and Arizona. — 
Tribe it, Heliotropiex Endl. Gen. 646. Leaves entire, rarely 
denticulate. Inflorescence more or less scorpioid. Style entire, 
sometimes wanting. Stigma peltate-annular, forming a complete 
ring, surmounted usually dy an entire or 2-lobed hemispherical to 
