SCDTELLARU. XCIII. LABIAT7E. 423 



as the whole plant, clothed with a whitish wool. Leaves petiolate, taper- 

 ing to an obtuse point, pale, with whitish down beneath. Flowers purplish, in 

 very hairy, mostly terminal whorls or heads. Peduncles cymosely branched, 

 short. Involucre of narrow and bristle-like bracts, about equaling the hairy, 

 subulate calyx teeth. July. 



TRIBE 6. SCUTELI/ARINEJE. Calyx bilabiate, upper lip truncate. Co- 

 rolla bilabiate, upper lip vaulted, tube ascending, exserted. Stamens 4, 

 ascending beneath the upper lip of the corolla. 



21. SCUTELLARIA. 



Lat. scutella, a small vessel ; from the resemblance of the calyx with its appendages. 



Calyx campanulate, bilabiate, lips entire, upper one appendaged on 

 the back and closed after flowering ; cor. bilabiate, upper lip vaulted, 

 lower dilated, convex, tube much exserted, ascending ; sta. ascending 

 beneath the upper lip; anth. approximate in pairs. 



* Flowers axillary, solitary. 



1. S. GALERICULATA. Common Scull-cap. 



Sf: erect, simple, or branched ; Ivs. lanceolate-cordate, remotely crenate- 

 serrate ; fls. axillary, solitary. 7J. Meadows and ditches, Can. to Penn. Abun- 

 dant. The whole plant glabrous. Stem square, 12 18' high. Leaves trun- 

 cate-cordate at base and acutish at apex, scarcely petiolate, 1 J' by '. Flowers 

 much larger than the preceding, rarely more than 1 from the same axil, with a 

 vizor- like calyx like that of the other species. Cor. an inch in length, blue. Aug. 



2. S. NERVOSA. Pursh. (S. gracilis. Nutt.) 



SL slender, erect, subsimple, stoloniferous ; Ivs. broad-ovate, subcordate, 

 crenate-serrate, sessile, glabrous, 3 5-veined, lower roundish-ovate, upper ovate 

 and lance-ovate, slightly petioled ; fls. axillary, solitary. Rocky shades, a.ong 

 streams, Penn. ! to 111. ! and La. Roots creeping, often sending out long, n'li- 

 form stolons. Stem 8 15' high, weak, often with a few filiform branches. 

 Leaves 2 15" by 512", the middle pairs largest, acute or obtusish. Floral 

 leaves entire, small. Flowers few, sometimes on the slender branches only. 

 Corolla pale blue, 4 G" long. May Jl. 



3. S. PARVULA. Michx. (S. ambigua. Nutt.) 



St. simple or branching at base, square, puberulent ; lower Ivs. suborbicu- 

 lar, petiolate, upper oblong-ovate, obtuse, entire, sessile, axillary, opposite. 

 Pastures, Mid.! and Western States! Plant 36' high. Root generally (not 

 always T\ with tuberous internodes, and fibrous at each joint. Leaves 3 6" 

 long, } as wide, lower 3" diam. Flowers 46" long, rather numerous, longer 

 than the leaves, blue. June. 



* * Flowers in axillary and terminal racemes. 



4. S. LATERIFLORA. Mad-dog Scull-cap. 



St. branching, nearly glabrous; Ivs. ovate-lanceolate, acuminate, serrate, 

 petiolate ; roc. lateral, axillary, leafy. Meadows and ditches, lat. 38 to Arc. 

 Am. Siem square, 1 2f high, very branching. Leaves opposite, rounded at 

 oase, acuminate or acute, coarsely serrate, on petioles an inch in length. Ra- 

 cemes opposite, axillary, somewhat one-sided, on long stalks, and consisting of 

 numerous small, blue flowers intermixed with small leaves. The English 

 name is due to the singular form of the calyx, which after flowering, closes 

 upon the seeds like a cap or vizor. July, Aug. 



5. S. PILOSA. Michx. Darl. (S. ovalifolia. Bart.) 



St. erect, mostly simple, hirsute-pubescent; Ivs. pubescent, rhomboid 

 ovate or oval, crenate-serrate, petiolate, in remote pairs; roc. terminal, rathei 

 short ; bracts elliptic-ovate. Open woodlands, Penn. to Car. Stem 1 lf high, 

 purplish. Leaves few, 1 2j by f H', cuneately narrowed to the petiole, 

 rather obtuse. Raceme generally simple and few-flowered, with opposite, el- 

 liptical bracts. Pedicels and calyx hairy. Corolla tube nearly white below, 

 blue at summit, 6 9" long. June Aug. 

 36* 



