354 DIDYXAMIA GYMNOSPERMIA 



Root (rhixotna?) perennial, creeping, horizontal, jointed, with tuberous inter- 

 nodes, rendering it moniliform, and verticils of fibres from the joints. Stern 4 to 

 8 or 10 inches long, sometimes simple, generally more or less branched, especially 

 from the base, spreading, or decumbent, slender (when old rather rigid), mi- 

 nutely scabrous on the angles, mostly purple. Leaves 1 third to 2 thirds of an Inch 

 long, and 1 eighth to 1 third of an inch wide, prominently nerved, scabrous with 

 short hairs on the upper surface and nerves, margin entire and revolute, under 

 surface often dark purple ; lower leaves roundish-cordate, on short petioles, upper 

 ones oblong-ovate, sessile. Flowers small, on pubescent pedicels as long as the 

 calyx. Calyx hairy, mostly purple ; galeate appondage prominent. Corolla violet- 

 purple, hairy externally, 1 third to near half an inch long. Akenes rugose-tuber- 

 culate, on a common pedicel. 

 Hab. Serpentine ridge, W. Chester; Schuylkill: rare. Fl. May-June. FY. July-Aug. 



Obs. Collected by D. Townsbnd, Esq. in 1829. This plant has much resem 

 blance to my English specimens of S. minor : But 1 have received Kentucky spe- 

 cimens from Prof. Short, which are much stouter, with remotely dentate leaves, 

 and appear to be intermediate between this and the following species. 



4. 8. nf.ryos a, Pursh. Stem erect, mostly simple, slender and weak, 

 smoothish ; lower leaves roundish-cordate, petiolate, middle ones broad- 

 ovate, crenatc-dentate, sessile, upper or floral ones ovate-lanceolate, en- 

 tire ; flowers axillary, solitary, opposite. Benth. Lab. p. 441. 



5. parviflora ! JlfuhL Catal. p. 56. 



S. gracilis. JV m utt. Gen. 2. p. 37. Bart. Phil. 2. p. 38. Torr. Comp. 

 p. 237. Beck, Bot.p. 281. EaU Man. p. 332. 



Nerved Scutellaria. 



Plant mostly pale green. Root perennial, fibrous,— often with slender horizon- 

 tal rhizoma-like runners, or branches, from the neck. Stem 9 to 15 inches high, 

 mostly erect, but often curved and decumbent at base, rarely branched ; angles 

 acute and somewhat winged. Leaves half an inch to an inch and half long, and 1 

 third of an inch to an inch wide, in rather distant pairs, prominently nerved, thin 

 and smoothish, sometimes hairy, particularly on the upper surface, and ciliate on 

 the margin; lower ones small, roundish-cordate, petiolate, purple beneath ; mid. 

 die ones largest, cordate-ovate, rather obtuse, coarsely and sparingly crcnate- 

 dentate, sessile ; upper ones gradually smaller, more lanceolate, entire, subsessile. 

 Pedicels solitary, opposite, in the axils of the diminishing upper leaves, pubescent, 

 longer than the calyx. Calyx smoothish, the nerves and margins somewhat cili- 

 ate, the galeate appendage becoming much enlarged, broad and roundish-obovate. 

 Corolla pale blue, minutely pubescent externally, 1 third to half an inch long. 

 Akenes rugose-tuberculate, supported on a conspicuous common pedicel. 



Hab. Banks of the Schuylkill; Black Rock: rare. Fl. May- June. Fr. July-Aug 



Obs. Collected in the above locality by Mr. John Marshall, in 1629. It has 

 not yet been found elsewhere, within the County. 



5. S. lateriflora, L. Stem rather erect, much branched, smooth- 

 ish ; leaves ovate-lanceolate, acuminate, coarsely serrate, rounded at 

 base, petiolate ; racemes axillary, leafy. Beck, Bot. p. 282. 



Lateral-Flowered Scutellaria. Vulgo — Mad-dog Scull-cap. 



Root perennial. Stem I to 2 feet high, much branched , smooth, angles slightly 

 scabrous, sides concave. Leaves 1 to 3 inches long, and half an inch to an inch 

 and half wide, diminishing as they ascend, smooth and thin, on petioles half an 

 inch to an inch in length. Flotcers in leafy racemes terminating the slender axil- 



