416 LABIATE. (MINT FAMILY.) 



22. CEDRONELLA, Moench. 



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

 at the throat, 2-lipped; the upper lip flattish 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 pur- 

 plish flowers. (Name a diminutive of cedrus, the cedar-tree, from the aro- 

 matic leaves of C. triphylla, the Balm-of-Gilead of English gardens.) 



1. C. COrdata, Benth Low, with slender runners, hairy ; leaves broadly 

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

 flowered, at the summit of short ascending stems; corolla hairy inside (!' 

 long) ; stamens shorter than the upper lip. Moist shady banks, W. Penn. to 

 Ky., south to the mountains of N. C. and Tenn. 



23. NEPETA, L. CAT-MINT. 



Calyx tubular, often incurved, obliquely 5-toothed. Corolla dilated in the 

 throat, 2-lipped ; the upper lip erect, rather concave, notched or 2-cleft ; the 

 lower spreading, 3-cleft, the middle lobe largest, either 2-lobed or entire. Sta- 

 mens 4, ascending under the upper lip, the lower pair shorter; anthers ap- 

 proximate in pairs, the cells divergent. Perennial herbs. (The Latin name, 

 thought to be derived from Nepete, an Etrurian city.) 



1. Ci/mose clusters rather dense and man //-/lowered, forming interrupted spikes 

 or racemes ; upper floral leaves small and bract-like. 



N. CAT\BIA, L. (CATNIP.) Downy, erect, branched ; leaves heart-shaped, 

 oblong, deeply crenate, whitish-downy underneath ; corolla whitish, dotted 

 with purple. Near dwellings; a very common weed. July -Sept. (Nat. 

 from Eu.) 

 2. GLECH6MA. Leaves all alike; the axillary clusters loosely few-flowered. 



N. Gi.ECH6MA, Benth. (GROUND IVY. GILL-OVER-THE-GROCND.) Creep- 

 ing and trailing; leaves petioled, round kidney-shaped, crenate, green both 

 sides ; corolla thrice the length of the calyx, light blue. Damp or shady 

 places, common. (Nat. from Eu.) 



24. DRACOCEPHALUM, Tourn. DRAGON-HEAD. 



Calyx tubular, 13- 15-nerved, straight, 5-toothed; the upper tooth usually 

 much the 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 . 

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

 mostly spiked or capitate, and with awn-toothed or fringed leafy bracts- 

 (Name from SpaKtav, a dragon, and Ke<t>a\Ji, head, alluding to the form of the 

 corolla in the original species.) 



1. D. parviflorum, Nutt. Annual or biennial; 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 or gravelly soil, northern 

 N. Y. to Iowa and Minn., and westward. 



25. SCITTELLARIA, L. SKULLCAP. 



Calyx bell-shaped in flower, 2-lipped ; the lips entire, closed in fruit, the up- 

 per with a helmet-like at length concave and enlarged appendage on the back 



