698 



LABI AT AE (MINT FAMILY) 



the small slender bluish corolla. Rocky or gravelly 

 calcareous soil, chiefly in recent clearings, e. Que. to 

 Yukon, south w. to n. and w. N. Y., Mich., Wise., la., 

 N. Mex., and Ariz.; occasionally adventive in N. E. 

 June-Aug. FIG. 892. 



11. PRUNELLA L. SELF-HEAL 



Calyx tubular-bell-shaped, somewhat 10-nerved, 

 naked in the throat, closed in fruit ; upper lip broad, 

 truncate. Corolla ascending, slightly contracted at the 

 throat and dilated at the lower side just beneath it, 

 2-lipped ; upper lip erect, arched, entire ; the lower 

 reflexed-spreading, 3-cleft, its lateral lobes oblong, the 

 middle one rounded, concave, denticulate. Filaments 

 2-toothed at the apex, the lower tooth bearing the 

 anther ; anthers approximate in pairs, their cells diverging. Low perennials, 

 with nearly simple stems, and 3-flowered clusters of flowers sessile in the axils 

 of round and bract-like membranaceous floral leaves, imbricated in a close spike 

 or head. (Name said to be from the German Braune, a disease of the throat, 

 for which this plant was a reputed remedy. Often written Brunella, which 

 was a pre-Linnean form.) 



1. P. vulgaris L. (HEAL-ALL, CARPENTER-WEED.) Leaves ovate-oblong, 

 entire or toothed, petioled, hairy or smoothish ; corolla violet or flesh-color, 

 rarely white, not twice the length of the purplish calyx. Woods and fields, 

 Nfd. to Fla., westw. across the continent. June-Sept. (Eu.) Var. LACINIATA L. 

 Some upper leaves tending to be pinnatifid. (P. laciniata L.) Said to be 

 introd. near Washington, D. C. (Adv. from Eu.) 



892. D. parviflorum. 

 Inflorescence x l / z . 

 Fruiting calyx x 2. 



12. PHYSOSTEGIA Benth. FALSE DRAGON HEAD 



Calyx obscurely 10-nerved, short-tubular or bell-shaped, more or less enlarged 

 and slightly inflated in fruit. Corolla funnel-form, with a much inflated throat, 

 2-lipped ; upper lip erect, nearly entire ; the lower 3-parted, spreading, small, its 

 middle lobe larger, broad and rounded, notched. 

 Smooth perennials, with upright wand-like stems, 

 and sessile lanceolate or oblong mostly serrate leaves. 

 Flowers large and showy, rose or flesh-color varie- 

 gated with purple, opposite, crowded in simple or 

 panicled terminal leafless spikes. (Name from 00<ra, 

 a bladder, and 0-7-^777, a covering, in allusion to the 

 calyx, which is at length somewhat inflated.) 



* Stem conspicuously leafy up to the inflorescence. 



1. P. virginiana (L.) Benth. Stem 0.5-1.3 m. 

 high, terminated by a simple virgate spike or several 

 panicled spikes ; leaves thickish, mostly sharply 

 serrate ; calyx tubular-campanulate, its teeth half 

 the length of the tube, acuminate, at length acerose- 

 tipped ; corolla 1.8-2.3 cm. long. Wet grounds, 

 from w. Que. westw. and southw. ; frequently 

 escaped from cultivation in e. N. E. June-Sept. 

 FIG. 893. 



P. parvifl6ra Nutt. Stem 2-6 dm. high, simple 

 to the inflorescence ; leaves thin, lanceolate, den- 

 ticulate to serrate ; spikes short and dense ; calyx- 

 teeth short and blunt; corolla 1-1.5 cm. long. 

 Wet banks, Wise, to Sask., N. Dak., and westw. 

 July-Sept 



893. P. yirginiana. 

 Leaf and bit of spike x % 

 Anther x 3. 



