16 Engelmann and Gray, 
corolla, which are rarely somewhat nerved ; stigmata also pur- 
ple, and anthers purple or yellow. (ngel.) 
125. C. cuspipata (Engel. n. sp.): caule filiformi ramosis- 
simo ; floribus pedunculatis in cymas laxas bracteosas disposi- 
tis 5-fidis; tubo corolle cylindrico sepala usque ad_ basin 
libera ovata concava (exteriora cuspidata) et lacinias limbi 
ovatas acutiusculas uninervias erectas s. patentes superante ; 
staminibus limbo brevioribus ; squamis ovatis fimbriatis tubum 
subeequantibus ;_ stylis filiformibus "ovario (minuto) globoso 
pluries longioribus ; capsula globosa corolla marcescente ob- 
tecta. —Var. «. pratensis: floribus minoribus; calyce bracteis 
paucis involucrato ; tubo corollz subcylindrico calycis et co- 
rolle segmentibus paulo longiore ; staminibus limbi laciniis ova- 
tis acutiusculis duplo brevioribus ; stylis ovarium parvum duplo 
superantibus. — Dry prairies west of the Brazos, on Tephrosia, 
Bradburia, Ambrosia, &c. June. — Var. 8. numipa: floribus 
majoribus ; calyce bracteis pluribus involucrato ; tubo corollee 
infundibuliformi calycis et corollze segmenta duplo superante ; 
staminibus laciniis limbi lanceolatis acutis paulo brevioribus ; 
stylis ovarlum minutum quater superantibus. Bottom lands 
of the Colorado, on Iva ciliata, Ambrosia trifida, &c. August, 
1844, (No. 276, infra.) —A remarkable species. The stems 
are very much branched, filiform ; inflorescence loose panicu- 
late, pedicels with many cuspidate bracts, some of them sur- 
rounding the calyx like an involucrum, similar in shape but 
smaller than the sepals ; sepals somewhat lacerate or crenu- 
late, ovate, carinate, (the carina less distinct in the var. §,) 
cuspidate, interior ones rather obtuse, all concave, loosely im- 
bricated. Lobes of corolla thin membranaceous, with a strong 
middle nerve, formed by large oblong or linear cells; when 
dry, convolute ; the exterior ones generally somewhat cuspi- 
date, the interior ones obtuse ; at the base the lobes are dilated 
and cover one another, more than in any other North Ameri- 
can species. Styles remarkably slender and long, about the 
length of the stamens, but elongated after flowering, when the 
corolla assumes an urceolate shape, and finally covers like a 
