258 BORRAGINACE^. (BORAGE FAMILY.) 



9 Onosmodium. Corolla tubular or oblong-funnelform, with open and wholly unap. 

 jiendaged throat; the lobes erect or hardly spreading ; the sumses more or less in- 

 flexed. Style filiform or capillary, very long: stigma exseited before the corolla opens. 

 Nutlets ovoid or globular, bony, smooth and polished, white. Flowers all subtended 

 by leafy bracts. 



1. COLDENIA, L. 



Low herbaceous plants, canescent or hispid ; with small aud mostly white 

 flowers sessile and usually in clusters : leaves entire, petioled, veined. 



1. C. Nuttallii, Hook. Prostrate annual, repeatedly and divergently 

 dichotomous : leaves ovate or rhomboid-rotund, 2 to 4 lines long and on longer 

 petiules, with 2 or 3 pairs of strong and somewhat curving veins, and margins 

 somewhat revolute ■ flowers densely clustered in the forks and at the ends of 

 the naked branches: fllaments inserted nearly in the throat of the pink or 

 whitish corolla, the tube of which bears 5 short obtuse scales near the base : 

 nutlets marked with a linear and rhaphe-like ventral scar. — Dry plains^ from 

 Wyoming to Washington and southward to Arizona and California. 



2. HELIOTROPIUM, Tourn. Heliotrope. 



Low herbs or undershvubs : the flowers almost always small. In ours the 

 corolla is large, white, and not appendagcd 



* Fruit didijmoua, solid : autkei'S slinldjy cohering by their minute/ 1/ bearded tips : 



st'/le long and filiform ; rone of the sti>jma truncate and bearded with a jiencd- 

 late tuft of strung bristles .• floioers scattered. 



1. H. convolvuliceum, Gray. Low spreading annual, strigose-hirsute 

 and hoary, much branched : leaves lanceolate or sometimes nearly ovate and 

 sometimes linear, .short-petioled : flowers generally opposite the leaves and. 

 terminal, short-peduncled : limb of the corolla ample, angulate-lobed ; the 

 tube strigose-hirsute, about twice the length of the sepals. — Sandy plains, 

 Nebraska to W. Texas aud westward. 



* * Fruit 4-lobed : anthers fee: style none: stigma umbrella-shaped, not sur- 



mounted b'/ a cone: flowers in distinct unilateral scorpioid spikes. 



2. H. Curassavicura, L. Wholly glabrous and glaucous, diffusely 

 spreading, a span to a foot high : leaves succulent, oblanceolate, varying from 

 nearly linear to obovate : spikes mostly in pairs or twice forked, den.sely 

 flowered : corolla white, with a yellow eye : stigma as wide as the glabrous 

 ovcry, flat. — Along the sea-coasts, also in the interior in saline soils. 



3. ECHIWOSPERMUM, Lehm. Stickseed. 



Either pubescent or hispid : with racemose or spicate flowers, usually small, 

 bluish or whitish. The nutlets are troublesome burs. 



* Racemes panicled, leafg-bracteate only at base, viinutely bracteafe or bractless 



above: })edicels recurved or de flexed in fruit: calyx-lobes shorter than the fruit, 

 and at length refle.red under it: scar of the nutlets ovate or triangular : plants 

 pubescent or hirsute, but not hispid. In ours the corolla is rotate. 

 1- E. floribundum, Lehm. Eather strict, 2 feet or more high, or some- 

 times smaller : leaves from oblong- to linear-lanceolate ; the lowest tapering into 



