92 SYNOPSIS OF THE FLORA ae COLORADO. 
cles, 6/’-12” long ; flowers purple or penahiatiolke — white ; anthers 
glabrous except along the dehiscence.—Colorado, Par 
PENTSTEMON CRULEUS, Nutt. Gr. Rev. l. ¢. op: a1. (P. ee ae 
Nutt.) A span high; glabrous or the upper stem ‘and leaves usuall yu 
utely pubescent; leaves linear-lanceolate, thick, entire, sessile, ret 
crowded ; sepals lanceolate, gradually acuminate, often ciliolate ‘on the 
margins, ’ white-membranaceous; corolla 6” long, somewhat dilated, 
searcely 2-lipped, bright azure or purplish-blue ; anthers glabrous, often 
with short-ciliate margins; sterile filament, ustally dilated and yellow- 
tere sre the apex.—Foot-hills near Denver, Coulter. 
PEN MON ACUMINATUS, Dougl. Gr. Rev. l.¢., p. 61. Glabrous and 
zlancons 8, “C. 18’ high; radical leaves spatulate, cauline lanceolate, oblong 
r ovate- ont or the upper ones subcordate, rigid, glaucous ; thyr- 
pan elongated, many-flowered, often secund; sepals either ovate or 
ceolate, acute’ br acuminate; corolla 6/— 10” long, blue or purple, tube 
gradually dilated servi lobes rounded, flat, spreading; capsule very 
sharply acuminate.—Hall & Harbour, 386; Parr ry. Near Denver, Dr. 
Smith. Colorado Springs, Porter. B. H. Smith. Monument Park and 
Clear Creek ee Coulter. 
PENTSTEMON SECUNDIFLORUS, Benth. DC. Prod, 10, p. 325. Glabrous. 
pale, thie enticdhiat glaucous, 12’-30' high; radical ‘leav es petioled, ellip- 
tie- <i ulate or narrowly-lanceolate, obtuse or acute, upper ones lanceo- 
late or linear-lanceolate, sessile, middle ones 3/—4/ long, erect; thyrsus 
eongatad, narrow, 6/-9 long, interrupted; cymes secund, few -many- 
flowered ; segments of the calyx oval-oblong, acute or acutish; with mem- 
branous margins; tube of the corolla more or less abraptly ampliated 
below the middle; anthers glabrous or very minutely Pabeiniains 
sterile filament dilated atthe apex, not veanine (beetdea, Benth.)—This 
alr is merged by Dr. Gray into the greceding one, Rev. Pents t., p. 62, 
but it seems to maintain its distinetive ¢ laseoen well. It is extremely 
abundant on the plains and at lower elevations in the mountains. zeae 
City, Brandegee. Denver, Dr. Smith. Geor ~ Seg n, B. H. Smith. Colo- 
rado Springs, Porter. Monument Park, Can 
PENTSTEMON AMBIGUDS, Torr. Gr. Rev. l.c., p. 64. Glabrous, 19-2° 
high, eee branching from a ligneous base ; lower sia ‘linear, 
attenuated at base; upper ones subulate-filiform Of acerose- subulate ; 
racemes loosely-flowered ; corolla 5/8” pes tube 6”, often incurved, 
searcely dilated above, with the spreading limb, 6” in diameter; sterile 
filament _— .—Southeastern Colorado asi R. Diffe 
e, acu 
tire ; peduncles niiiieby: cheesy secund, at length decurved, spread- 
ing, with 2 leafy bracts at the apex and 1-3 flowers ascending on short 
pram sepals linear- precrane E rather broader and scarious- -uiangined 
e base; corolla 6//— g, bluish-purple, tubular, somewhat lilated 
pelt and hiplicnte limb” pe bilabiate, with nearly equal "jobes: 
| sosaeaige long-bea: arded.—Middle elevations. Halld& Harbour, 3933 
Middle , Parry. South Park, Porter. Taylor River, Coulter. Catton 
City, oebicegse: Canby. 
NISTEMON ALBIDUS, Nutt. Gen. 2, p. 53. Stem puberulent, 6/9 
high; lower leaves petioled, oblong, se Aa subentire, upper serrate, 
lanceola’ te, glabrous or puberulent; thyrsus oblong, subverticillately- 
