338 Labiatae 



2. LIPPIA L. 



Perennial herbs with opposite sometimes verticillate 

 or rarely alternate leaves, and small bracted flowers in 

 axillary or terminal heads or spikes. Calyx small, mem- 

 branous, ovoid, campanulate or compressed and 2-winged, 

 2-4-toothed or 2-4-cleft. Corolla cylindric, the limb 

 oblique spreading, somewhat 2-lipped, 4-cleft, the lobes 

 broad, often retuse or eroded. Stamens 4, didynamous : 

 anthers not appendaged, the sacs nearly parallel. Ovary 

 2-celled ; ovules 1 in each cell ; style short ; stigma 

 oblique or recurved. Fruit dry with a membranous 

 exocarp, at length separating into 2 nutlets. 



1. L. lanceolata Michx. Green, glabrous or very sparingly 

 pubescent with forked hairs ; stems slender, weak, procumbent or 

 ascending, often rooting at the nodes, simple or little branched, 

 3-6 dm. long; leaves thin, oblong, ovate or ovate-lanceolate, 

 short-petioled, acute, sharply serrate to below the middle, nar- 

 rowed at base, 2.5-7 cm. long ; peduncles axillary, slender, usually 

 longer than the leaves ; heads at first globose, becoming cylindric, 

 about 15 mm. long in fruit ; bracts acute ; calyx flattened, 2-cleft ; 

 corolla pale blue, scarcely longer than the calyx. 



Occasional along slow-running streams in marshy places. June-August. 



Family 84. LABIATAE. MINT FAMILY. 



Aromatic punctate herbs or shrubs, with mostly 

 4-sided stems, simple opposite exstipulate leaves, and 

 irregular perfect flowers variously clustered. Calyx 

 regular or 2-lipped, 5-toothed or 5-lobed, or rarely 

 4-toothed or 4-lobed, persistent. Corolla mostly 2-lipped ; 

 upper lip usually 3-lobed. Stamens inserted on the 

 corolla-tube, generally 4 and didynamous, sometimes 2 

 with or without staminodia ; anthers 2-celled, introrse or 

 confidently 1-celled. Ovary superior, 4-lobed or 4-parted ; 

 style 2-lobed. Fruit of 4 1-seeded nutlets. 



