or virgately branched, with the bracts and calyx densely and minutely pubescent 

 with glandular and nonglandular hairs; calyx 6-10 mm. long, the teeth narrowly 

 deltoid-lanceolate; corolla showy, light-lavender-violet to whitish, with rose- 

 purple spots, 22-32 mm. long, the tube 7-14 mm. long, often exserted from calyx; 

 cocci dark-brown, about 4 mm. long, sharply 3-angled. P. serotina Shinners. 



Along streams and ditches, in moist grasslands in e. and n.-cen. Tex., with 

 a disjunct area in the Guadalupe Mts., Aug.-Oct.; also La. and N.M., probably 

 also Okla. 



5. Physostegia Correllii (Lundell) Shinners. Fig. 666. 



Plants erect, robust, somewhat succulent, to 22 dm. high, with thick creeping 

 rhizomes: stems simple or sparingly branched, to 25 mm. thick, glabrous, as 

 many as 20 nodes per stem; leaves decussately opposite, sessile, leathery and firm, 

 elliptic or oblong-elliptic, 5-13 cm. long, 2-6.5 cm. wide, short-acuminate at 

 apex, slightly narrowed at base and inconspicuously clasping, the margin con- 

 spicuously and sharply serrate-dentate to base, primary veins usually 2 or 3 on 

 each side, the upper leaves only slightly reduced; racemes spikelike, simple or com- 

 pound, short, leafy at base, finely pubescent, comparatively few-flowered; bracts 

 leafy, ovate, those at base of raceme equal to or longer than calyx, reduced above, 

 acuminate; pedicels very short, about 1 mm. long in fruit; calyx finely pubescent, 

 gland-tipped hairs abundant, subcylindric, 8-9.5 mm. long, the acuminate lobes 

 slender and subequaling tube, inflated at maturity; corolla lavender-pink, spotted 

 or streaked with purple, about 3 cm. long, sparsely pubescent; cocci about 2.3 mm. 

 long, sharply angled. Dracocephalum Correllii Lundell. 



In water along streams and in irrigation ditches in Val Verde Co., Tex., June- 

 July; also N. L. and Son. 



6. Physostegia Digitalis Small. Fig. 667. 



Stems erect, to 2 m. high, stout, sharply angled; leaves several, sessile and 

 partly clasping at base, somewhat leathery-thickened, oblong to elliptic-oblong, 

 to 22 cm. long and 75 mm. wide, acute to subacute, the margins undulate or 

 repand-serrate above the middle; raceme simple or compound, finely pubescent; 

 bracts ovate-lanceolate to lanceolate, 4-6 mm. long; pedicels very short; calyx 

 8-10 mm. long, the tube turbinate or cylindric-turbinate, the lanceolate lobes 

 acuminate and about one half as long as the tube; corolla pale-lavender to whitish, 

 commonly with reddish-purple dots, 2-2.5 cm. long, barely puberulent dorsally, 

 the upper lip slightly undulate, the lower lip spreading with the lobes oblong 

 (the middle lobe emarginate and about twice as long as the others). P. obovata 

 of auth. 



In sandy open pinelands, edge of forests, prairies, grasslands and swampy areas 

 in e. Tex., June-Aug.; from e. Tex. to La., Ark. and probably Okla. 



7. Physostegia pulchella Lundell. Fig. 668. 



Erect rhizomatous herb to 14 dm. high, slender or robust; stem to 15 mm. in 

 diameter near base; basal leaves chartaceous. usually with slender petioles to 

 8 cm. long, expanded and clasping at base, narrowed above, entire to subentire 

 or remotely dentate; leaves above base oblong-lanceolate or oblong-elliptic, to 

 12 cm. long and 25 mm. wide, tapering into a winged petiole, obtuse at apex, the 

 margin subentire to denticulate; leaves of middle stem rather firm, chartaceous, 

 pallid, oblong to oblanceolate-oblong or oblong-elliptic, 7.5-15 cm. long, 1-2 cm. 

 wide, sessile and clasping at base or with a broadly winged petiole below, the apex 

 acute or obtuse, the margin usually serrate to base or sometimes subentire below; 

 apical leaves bractlike below the inflorescence; inflorescence densely pubescent 

 throughout, simple or with two or more lateral branches from the basal bracts, 

 usually less than 3 dm. long, sometimes to 6 dm. long; flowers rather remote, 



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