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* Calyz-throat conspicuously bearded ; the upper lip with 3 broad short teeth ; all the teeth 
cuspidate: corolla pilose-annulate within : stamens separate, the lower anther-cells 
shorter, more or less polleniferous : leaves mostly narrow and entire: flowers racemose 
or spicate. 
1. S. Texana Torr. Stems with margins of leaves and calyx hirsute with long and 
spreading bristly hairs: flowers spicate, the upper floral leaves not exceeding the 
calyx, which equals the dilated throat of the widely ringent blue corolla.—Open 
rocky soils, southern and western Texas. On the hills of the Pecos and Rio Grande, 
southwestern Texas, occurs var. CANESCENS Gray, a form with leaves hoary-white 
with fine tomentum, all narrowly linear, with strongly revolute margins, and fewer 
flowers in the axils of the upper ones. 
2. S. Eugelmanni Gray. Minutely puberulent and glabrate, the setose hairs few 
and scattered or nearly wanting: lower leaves sometimes denticulate; floral mostly 
equaling the more scattered flowers: corolla with narrower tube and throat twice 
the length of the calyx, light purple.—Western Texas. 
* * Calyx-throat naked (exc. in no. 5) ; upper lip truncate and remotely 3-toothed: corolla 
elongated, mostly pilose-annulate within: stamens separate, the lower fork of the 
connective bearing a polleniferous anther-cell: leaves lyrately lobed or toothed or 
pinnately divided: flowers loosely racemose. 
+ Corolla blue or violet: cauline leaves (if any) sessile or narrowed into wing-margined 
petioles, 
3. S.lyrata L. Low, 2.5 to5 dm. high, somewhat hairy: stem nearly simple and 
naked: root-leaves lyre-shaped or sinuate-pinnatifid, sometimes almost entire; those 
of the stem mostly a single pair, smaller and narrower; the floral oblong-linear, not 
longer than the calyx: whorls loose and distant, forming an interrupted raceme; up- 
per lip of pubescent corolla short, straight, not vaulted.—Woodlands and meadows, 
extending from the Atlantic region to Texas. 
+ + Corolla scarlet-red: cauline leaves all slender-petioled, at least the lower ones 3 to 
5-foliolate. 
4, S. Reemeriana Scheele. Stems and petioles below often sparsely hirsute with 
long spreading hairs: leaves or terminal leaflet roundish or reniform-cordate, coarsely 
repand-toothed or crenately incised; lower usually with 2 or 3 similar but smaller 
lateral leaflets (these occasionally reduced to dentiform appendages on the petiole): 
raceme loose and elongated: calyx somewhat pubescent, naked within.—In light 
fertile soil, western Texas, 
5. S. Henryi Gray. More slender, less soft-pubescent: leaves or mostly leaflets 
smaller, seldom cordate, angulate-lobed; lower floral ones often similar, all as long 
as the pedicels: calyx hirsute, ciliate-bearded or villous in the sinuses and throat: 
corolla apparently narrower and with shorter less notched lips; the bearded ring at 
base within obsolete.—Extreme western borders of Texas. 
** * Calyx-throat naked: corolla not pilose-annulate: anterior portions of connectives 
deflexed, linear or gradually somewhat dilated downward, closely approximate or 
connate, and destitute of an anther-cell. 
+ Corolla crimson, its tube villows-annulate towards base inside; upper lip conspicuously 
larger and longer than the lower: anterior fork of connectives free and spatulate- 
dilated downwards. 
6. S. pentstemonoides Kunth. Nearly glabrous, or sparsely hirsute below: stem 
6 to 15 dm. high, leafy to the summit: leaves oblong-lanceolate, acute, mucronate, 
entire or obscurely denticulate and with ciliolate-scabrous margins, the lower on 
long margined petioles; upper gradually much smaller and sessile: cymules sub- 
sessile, 3 to 5-flowered: upper calyx-lip truncate, with 3 short and broad cuspidate- 
mucronate teeth: style glabrous.—Southern Texas, from the Pierdenales to the Rio 
Grande. 
