in Tex. along the coast and Rio Grande Plains, w. to the Trans-Pecos, w to Ariz. 

 (Maricopa, Pinal, Santa Cruz, Pima and Yuma cos.), throughout the year; from 

 s.w. U.S., through W. I. to s. S.A. 



The following varieties are found in our area: 



1. Plant annual, pubescent along the stem and in the inflorescence with scattered 

 long coarse somewhat curled hairs; flowers disposed often nearly 

 to the base of the stems; cocci conspicuously pubescent at the apex 

 with a tuft of hairs; in the Tex. Trans-Pecos westward [T. depres- 

 sum (Small) McCl. & EpI.] var. densum Jeps. 



1. Plant annual or perennial, glabrous or sparingly puberulent along the stem 



and in the inflorescence; flowers chiefly in upper part of stem; 

 cocci with globular glands or rarely minutely pubescent (2) 



2(1). Median leaves irregularly lobed about halfway to the midrib or only deeply 

 crenate; floral leaves 3-lobed to the middle or entire [subsp. 

 chamaedrifolium (Mill.) Epl.] var. cubense. 



2. Median leaves mostly 3- or 5-lobed nearly to the midrib, the lobes linear; 



floral leaves 3-parted nearly to the base [T. laevigatum Vahl, 



Melasma laevigatum (Vahl) Small] 



subsp. laevigatum (Vahl) McCl. & Epl. 



2. Scutellaria L. Skullcap 



Bitter perennial or annual herbs or subshrubs, commonly rhizomatous or 

 tuberous, not aromatic; flowers 1 to 3 together on short peduncles or pedicels 

 in the axils or often in 1 -sided bracted axillary racemes or terminal spikes or 

 racemes; calyx campanulate in flower, splitting to the base at maturity, strongly 

 bilabiate, the lips entire, the upper longer lip usually falling away, in fruit 

 with an appendage or scale; corolla with an elongated curved ascending tube ex- 

 serted from the calyx, dilated at the throat, the upper lip entire or barely notched, 

 the lateral lobes mostly connected with the upper rather than the lower lip, the 

 lower spreading lobe or lip convex and notched at the apex; stamens 4, ascending 

 under the upper lip; anthers approximate in pairs, ciliate or bearded, those of the 

 lower stamens 1 -celled, those of the upper stamens 2-celled and cordate; cocci 

 variously marked. 



About 300 species of wide geographic distribution. 



Seeds of some species are eaten by birdlife. 



1. Median cauline leaves oblong to linear-lanceolate, entire, tapered at base to 

 a short petiole 1. S. integrifolia. 



1. Median cauline leaves deltoid-ovate to ovate-oblong, more or less dentate or 



serrate, rounded to somewhat cordate at base (2) 



2(1). Median leaves ovate-oblong; petiole mostly 3 mm. long or less; distribu- 

 tion in Texas Panhandle westward 2. 5. galericulata. 



2. Median leaves broadly ovate to ovate-lanceolate; petiole usually much more 



than 5 mm. long (3) 



3(2). Stems strict and stiflRsh; calyx and triangular-ovate leaflike bracts sub- 

 tending the flowers coarsely ciliate on margins; galea and corolla 



tube 13-22 mm. long; distribution in eastern Texas 



3. S. cardiophylla. 



3. Stems mostly weak and spreading; calyx and elliptic-lanceolate bracts subtend- 



ing the flowers essentially glabrous or minutely puberulent; galea 

 and corolla tube 5-7 mm. long; distribution in northeastern Texas 

 and Oklahoma westward 4. S. lateriflora. 



1. Scutellaria integrifolia L. Rough skullcap. Fig. 659. 



Perennial herb 3-7 dm. high; stems rather slender, 1 or several from a sub- 

 ligneous base, simple or with arched-ascending branches above, often with abbre- 



1412 



