812 LABIATJE. (MINT FAMILY.) 



2. GLECH6MA, L. Leaves all alike: the axillary dusters loosely few-JJoioerJ. 

 2. N. GLECH6MA, Benth. (GROUND IVY. GILL.) Creeping and trailing ; 

 leaves petiolod, round kidney-shaped, wen ate, green both sides; corolla thrice 

 the length of the calyx, light blue. (Glcchoma hederacca, L.) Shaded, waste 

 grounds near dwellings. May -Aug. Anthers with the cells diverging at a 

 right angle, each pair approximate and forming a cross. (Adv. from Eu.) 



21. DRACOCEPHALUM', L. DRAGON-HEAD. 



Calyx tubular, 1 3 - 1 5-nerved, straight, 5-toothed; the upper tooth usually 

 much largest. Corolla 2-lipped ; the upper lip slightly arched and notched ; the 

 lower spreading, 3-cleft, with its middle lobe largest and 2-cleft or notched at the 

 end. Stamens 4, ascending under the upper lip ; the lower pair shorter. An- 

 thers approximate by pairs, the cells divergent. Whorls many-flowered, mostly 

 spiked or capitate, and with awn-toothed or fringed leafy bracts. (Name from 

 dpdKW) a dragon, and Ke(jf)aX^, head, alluding to the form of the corolla.) 



1. I>. parvifloriim, Nutt. Stem erect, leafy (8' -20' high); leaves 

 ovate-lanceolate, sharply cut-toothed, petioled ; whorls crowded in a terminal 

 head or spike; upper tooth of the calyx ovate, nearly equalling the bluish small 

 slender corolla. (?) Rocky places, Jefferson and St. Lawrence Counties, 

 New York ; shore of Lake Superior, and northwestward. May -Aug. 



22. CEDRONEL.L.A, Moench. CEDRONELLA. 



Calyx rather obliquely 5-toothed, many-nerved. Corolla ample, expanded at 

 the throat, 2-lipped; the upper lip flatfish or concave, 2-lobed; the lower 3- 

 cleft, spreading, the middle lobe largest. Stamens 4, ascending ; the lower pair 

 shorter. Anther-cells parallel. Sweet-scented perennials, with pale purplish 

 flowers. (Name a diminutive of Kftipiov, oil of Cedar, from the aromatic leaves 

 of the originial species, C. triphylla, the Balm-of-Gilcad of English gardens.) 



1. C. COl'dsita, Benth. Low, with slender runners, hairy ; leaves broadly 

 heart-shaped, crenate, petioled, the floral shorter than the calyx ; whorls few- 

 flowered, approximate at the summit of short ascending stems ; corolla hairy 

 inside (1^' long) ; stamens shorter than the upper lip. (Dracocephalum corda- 

 tum, Nutt.) Low shady banks of streams, W. Penii. to Kentucky, and south- 

 ward along the mountains. June. 



23. SYNANDRA, Nutt. SYNANDRA. 



Calyx bell-shaped, inflated, membranaceous, irregularly veiny, almost equally 

 4-toothed ! Corolla with a long tube, much expanded above and at the throat ; 

 the upper lip slightly arched, entire ; the lower spreading and 3-cleft, with ovate 

 lobes, the middle one broadest and notched at the end. Stamens 4, ascending : 

 filaments hairy : anthers approximate in pairs under the upper lip ; the two 

 upper each with one fertile and one smaller sterile cell, the latter cohering with 

 each other (whence the name; from (rvv, together, and (ivrjp, for anfJur). 



l. S. graiidiflorci, Nuit. Shaded banks, Ohio, Kentucky, and south- 

 ward. June. A perennial ? hairy herb, 1 high. Low. r leaves Jong-pctioled, 



