MONOPETALOUS EXOGENOUS PLANTS. 413 



throat bearded; corolla 2-lipped, the upper lip erect, the 

 lower spreading, 3-cleft; stamens 4, didynamous, spread- 

 ing, exserted; anther-cells distinct, diverging, awned at the 

 apex; nutlets smooth. — Smooth annuals, with narrow leaves; 

 cymes loose, spreading, several-flowered, forming a leafy 

 terminal raceme ; floivers purple. 



D. LiNEARiFOLiA, Benth. Stem mostly branching, erect; 

 leaves linear or lanceolate, serrate or entire, obtuse, sessile; 

 cymes peduncled, 3-9-flowered; calyx purple, declined in 

 fruit. (Ceranthera linearifolia, Ell.) Dry sandy pine- 

 barrens. October and November. Stem 1° high ; leaves 

 1' long ; flowers very numerous, purple, dotted ; style hairy. 



SALVIA, L. Sage. 



Calyx tubular or bell-shaped, 2-lipped, the upper lip en- 

 tire or 3-toothed, the lower 2-cleft, beardless in the throat; 

 corolla 2-lipped, the upper lip entire or notched, the lower 

 spreading, 3-lobed, with the middle lobe larger, entire or 

 notched; stamens 2, short; anther-cells linear, widely sepa- 

 rated by the elongated oblique connective, the upper one 

 fertile, the lower imperfect or wanting; cymes in spikes, 

 racemes or panicles. 



* Upper lip of the calyx entire; lower anther-cell xoanting. 



S. AZUREA, Lam. Smooth; stem simple or branched; 

 leaves lanceolate or linear, obtuse, entire, or the lower ones 

 serrate, tapering at the base; racemes elongated; zuhorls 

 nearly sessile, G-12-flowered ; calyx longer than the pedicel, 

 the teeth ovate, acute; corolla 2-3 times as long as the 

 calyx, wliite or blue ; style bearded. Dry light or sandy 

 soil. July and August. Stem 2°-4° high ; leaves li'-S' 

 long; corolla 6"-8" long. 



** Upper lip of the calyx broad, Z-toothed ; lower anther-cell pollen-bearing, but sterile. 



S. LYRATA. Hairy; stem erect, sparingly branched; 



