de Se lateriflora L. Perennial with slender rootstocks, producing stolons 
at the lowermost nodes; stems 20-30 om. tall, usually branching above, hirbellous 
on the margins; leaf=-blades 2-5 om. long, ovate, subacute, rounded or sub- 
cordate at the base, nearly glabrous, the margins serrate: petioles .5-2 cm. long, 
slender; flowers disposed in axillary racemes 2-3 ome long, subtended by small 
subfoliar bracts; calyces 2 mme long at anthesis appressed-puberulent, increas- 
ing to 4 mm. in fruit, the scutellum 1.5 mm. tal 3; corolla pale blue or bluish, 
5-6 mn. long, the lower lip 2 mm. long, mtlets rather sharply tuberculate. _ 
Frequent along streams and lakes and in boggy ground. 
