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form to campanulate or almost rotate. equally or unequally inserted 
stamens, and pod with solitary to numerous wingless seeds. 
* Leaves opposite and palmately divided to the sessile base. 
1. G. Bigelovii Gray. Erect and slender glabrous annual: leaves filiform or nearly 
so, 3 to 5-divided, or the lower simple: flowers inconspicuous; the lobes of the sal- 
verform corolla not over 4 mm. long, hardly surpassing those of the calyx and only 
4 or ¢as long as its tube: calyx-tube cylindrical, white-scarions except the ribs: 
ovules 20 to 40 in each cell: pod cylindraceous or oblong, (G, dichotuma, var. parvi- 
fora Torr., Mex. Bound.)—Western borders of Texas. 
** Leaves alternate and pinnately incised, cleft, or divided, or rarely entire. 
+ Flowers capitate-congested or cymose-qlomerate, more or less leafy-bracted: bracts and 
calyx-lobes cuspidate (but not pungent) and pubescent or ciliate: corolla (white or 
barely purplish) salverform, with tube little longer than calyx: stamens shorter 
than corolla-lobes, inserted in or near the sinuses, 
++ Leaves all entire, acerose-subulate or filiform, 
2. G. Wrightii Gray. Stems rigid, virgate, from an indurated or woody base: 
very leafy to the top: leaves rigid, cuspidate-tipped: flowers capitate-crowded: 
bracts ovate-lanceolate, larger ones sparingly laciniate, tipped with an awn-like 
cusp, as are the subulate calyx-lobes: ovules 3 or 4 in each cell.—Extreme southwest- 
ern Texas, near the Rio Grande. 
+ ++ Leaves pinnatifid, trifid, or some entire: flowers cymose-glomerate: low annuals, 
3. G. pumila Nutt. Stems loosely woolly (at least when young), leafy: leaves nar- 
rowly linear, entire or mostof them 2 to 4-parted into divergent linear lobes, mu- 
cronate: corolla-tube slender, about thrice the length of its lobes and twice the 
length of the calyx-lobes: filaments slender, exserted: ovules about 6 in each cell.— 
Western Texas. 
4. G. polycladon Torr. Stems puberulent or sparsely pubescent, diffuse, very 
few-leaved: leaves pinnatifid or incised, with short oblong abruptly spinulose-mu- 
cronate lobes: corolla-tube hardly exceeding the calyx-lobes: filaments very short: 
ovules 2 in each cell.—Western Texas. 
+ + Flowers thyrsoid-paniculate and either glomerate or open, with narrow if any bracts: 
these and calyx-teeth not pungent-tipped: corolla salverform or trumpet-shaped, 
mostly elongated: stamens inserted unequally in or below the throat: leaves pin- 
nately parted into filiform or narrowly linear divisions. 
++ Corolla scarlet or red, with white varieties, 
5. G@. coronopifolia Pers. (STANDING CYPRESS). Glabrous or barely pubescent: 
stem 6 to18dm. high, very leafy throughout: divisions of the leaves and rhachis nearly 
filiform: flowers very numerous in a long and narrow compact thyrsus or panicle, 
scentless: corolla 2.5 to 3.5 em. long, scarlet (within yellowish and dotted with red) ; 
the lobes moderately spreading.—Dry sandy soil, extending from the Gulf States to 
western Texas. 
6. G. aggregata Spreng. Somewhat pubescent: stem 6 to 12 dm. high, less leafy: 
leaves with narrowly linear divisions: thyrsoid narrow panicle loose or interrupted, 
the fragrant flowers sessile in small clusters: corolla from scarlet to pink-red (rarely 
white); the lobes widely spreading, soon recurved. (Collomia aggregata Porter, )— 
Western Texas. e 
++ ++ Corolla purple to white. 
7. G. longiflora Don. Annual, glabrous, loosely paniculately branched: leaf-divi- 
sions long and slender: flowers loosely somewhat corymbose on slender peduncles: 
corolla white, showy: tube often 3.5 em, long; lobes orbicular or ovate: filaments 
very unequally inserted in upper part of tube: ovules 10 or 12 in each cell. (Col- 
lomia longiflora Gray.)—Western borders of Texas. 
