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« + Lower and sterile forks of the connectives mostly united with each other longitudinally, 
linear, oblong, or semihastate: corolla naked within throughout. 
++ Corolla red or scarlet. 
7. 8. Greggii Gray. Shrubby, glabrous or obscurely farinaceous-puberulent: leaves 
coriaceous, 1l-ribbed, almost veinless, oblong, very obtuse, entire, narrowed at base 
into a short petiole: corolla red or purplish-red, glabrous: style hairy along the 
upper side.—Southern borders of Texas. 
8. S. coccinea L. Perennial or annual, canescently pubescent or glabrate, or 
hirsute towards the base with long spreading hairs: leaves membranaceous, veiny, 
cordate or ovate, mostly acute, crenate, slender-petioled, mostly soft-tomentulose 
beneath: corolla deep scarlet-red, pubescent or puberulent outside: style glabrous.— 
Extending from the Gulf States to southern Texas. 
9. S. Regla Cav. Shrubby, minutely scabrous-puberulent: leaves broadly deltoid- 
ovate or subcordate, serrate, slender-petioled; floral ones similar: calyx becoming 
inflated and tinged with red: corolla nearly 5 cm. long, scarlet.—Chisos Mountains, 
southwestern Texas (Havard). 
++ ++ Corolla blue or purplish, sometimes white, never red. 
= Herbs. 
a. Flowers from near 25 mm. long to over 12mm. : corolla with prominently exserted tube: 
style bearded above: perennials, 3 to 15 dm. high. 
10. S. farinacea Benth. Minutely andcanescently puberulent, or glabrous below: 
lower leaves ovate-lanceolate or even ovate, with obtuse or cuneate or rarely subcor- 
date base, coarsely and irregularly serrate, on slender petioles; upper lanceolate or 
linear-lanceolate, sometimes entire: calyx very densely and softly white-tomentose, 
truncate, the teeth 3, very broad and obtuse, exceedingly short: corolla violet-blue.— 
Common in rich soil. 
11. S. azurea Lam. Glabrous or puberulent: lower leaves lanceolate or oblong, 
obtuse denticulate or serrate, tapering into a slight petiole; upper narrower, often 
linear, entire: calyx usually minutely puberulent, the very broad and obtuse upper 
lip distinct but short: corolla deep blue (sometimes varying to white).—Extending 
from the Gulf States to extreme western Texas. Associated with the species is var. 
GRANDIFLORA Benth., which is cinereous-puberulent, with denser inflorescence and 
calyx tomentulose-sericeous. 
12. S. angustifolia Cav. Usually glabrous (except usually some scattered bristly 
hairs): leaves linear, entire or obscurely denticulate, acute, somewhat petioled: 
calyx with lips half the length of the tube; the upper ovate, entire, acute: corolla 
blue.—A Mexican species, but represented in southwestern Texas by var. GLABRA 
Gray, which is wholly glabrous, even the hairy ring at the nodes wanting or obsolete 
(S. azurea Torr. Mex. Bound. in part). 
b. Flowers barely 12 mm. long or shorter: corolla-tube hardly at all exserted: style gla- 
brous or nearly so: leaves from linear to oblong-lanceolate, tapering into the slender 
petiole. 
13. S. lanceolata Willd. Puberulent or nearly glabrous: leaves lanceolate or 
linear-oblong, obtuse, irregularly serrate with obtuse appressed teeth or nearly entire; 
the inconspicuous floral ones lanceolate or subulate: calyx minutely hairy on the 
nerves: corolla 8 mm. long.——Plains throughout Texas. 
14. S. subincisa Benth. More pubescent above: leaves oblong-lanceolate, in- 
cisely dentate: the floral minute, ovate: calyx glandular-pilose: corolla 12 mm. 
long.—Western borders of Texas. 
= = Shrubby. 
15. S.chamzdryoides Cav. Low, much-branched, canescent and scabrous: leaves 
oblong or elliptical, more or less crenulate, obtuse, short-petioled: flowers in pairs 
or few in the clusters of the raceme: calyx hispidulous on the nerves: corolla blue, 
over 12 mm, long.—Caiions, etc., southwestern borders of Texas. 
