LAMIACEAE 1029 



1. Synandra hlspidula (Michx. ) Britton. Stems softly hispid or somewhat villous, 

 erect or decumbent, 2-8 dm. long, simple or branching, fleshy : leaf-blades ovate or orbic- 

 ular-ovate, 2-10 cm. long, obtuse or acute, or somewhat acuminate, crenate or serrate 

 above, cordate : panicles few-flowered, elongating, with sessile or clasping bracts : pedicels 

 stout : calyx becoming 1 cm. long at maturity ; tube constricted at the base, campanulate ; 

 lobes lanceolate, curved, slightly crisped : corolla white, 2.5-3 cm. long, minutely pubes- 

 cent, the upper lip oval or obovate, undulate, the lower lip with the middle lobe irregularly 

 toothed : filaments villous : nutlets 4 mm. long. [S. grandiflora Nutt.] 



In wet woods and along streams, Ohio and Illinois to Virginia and Tennessee. Spring. 



16. GALEOPSIS L. 



Annual caulescent herbs, with often bristly pubescent foliage. Leaves opposite : 

 blades flat, toothed, often petioled. Flowers in crowded cymes. Calyx campanulate to 

 tubular-campanulate : tube 5-10-ribbed : lobes 5, nearly equal, spine-tipped. Corolla 

 yellow, red or purple, sometimes mottled, 2-lipped : upper lip erect, concave : lower lip 

 spreading, 3-lobed, the middle lobe emarginate or notched. Stamens 4 : filaments all 

 anther-bearing : anthers 2-celled ; sacs opening transversely, the inner ciliate, the outer 

 glabrous. Nutlets smooth. 



1. Galeopsis Tetrahit L. Sterns more or less hirsute, 2-5 dm. tall, usually branched : 

 leaf-blades ovate to ovate-lanceolate or oblong-lanceolate, 2.5-7 cm. long, shallowly serrate, 

 acute or short-acuminate, more pubescent on the upper surface than on the lower, slender- 

 petioled : flower-clusters bristly pubescent : calyx 7-10 mm. long ; tube delicate ; lobes 

 spinescent, bristly pubescent about the base : corolla pink-purple, 1-1.5 cm. long : nutlets 

 about 3 mm. long. 



In waste places, Newfoundland to Alaska and North Carolina. Native of Europe. Summer and fall. 



17. LAMIUM L. 



Annual or perennial herbs, with diffusely branching stems. Leaves opposite : blades 

 flat, toothed or incised, usually petioled. Flowers in axillary more or- less remote clusters. 

 Calyx campanulate to tubular-campanulate : tube usually 5-nerved : lobes 5, equal or the 

 upper longer. Corolla white or blue, 2-lipped : upper lip erect, concave, usually entire : 

 lower lip spreading with 3 lobes, the lateral lobes narrow, the middle one dilated, often 

 notched. Stamens 4 : filaments all anther-bearing : anthers 2-celled ; sacs divergent, often 

 pubescent. Nutlets smooth or tuberculate. 



Upper leaf-blades sessile, clasping, uniformly green : corolla about 1.5 cm. long. 1. L. amplexicaule. 

 All leaf-blades petioled, blotched in the center : corolla 2-2.5 cm. long. 2. M. maculatum. 



1. Lamium amplexicaule L. Biennial, sparingly pubescent. Sterns usually branch- 

 ing at the base, the branches 1-4 cm. long, erect or decumbent : leaf-blades suborbicular 

 to orbicular-reniform, 1-3 cm. broad, crenate-lobed, truncate or cordate : bracts subtending 

 the flower-clusters, sessile, clasping : calyx villous-hirsute, becoming 5-6 mm. long ; lobes 

 lanceolate, somewhat shorter than the tube: corolla blue, 1.5 cm. long; tube slender, 

 dilated into a pocket near the upper end, the lower lip cleft by V-shaped sinus, the upper 

 lip pilose on top : nutlets 2 mm. long. 



In waste and cultivated grounds, New Brunswick to Ontario, Minnesota, Florida and Arkansas. 

 Naturalized from Europe, Winter to fall. 



2. Lamium maculatum L. Perennial, slightly pubescent. Stem and branches de- 

 cumbent or ascending, 2-4.5 dm. long : leaf-blades ovate or triangular-ovate, 2-6 cm. long, 

 crenate or incised-crenate, blotched near the midrib, truncate or cordate at the base, slen- 

 der-petioled : cymes few-flowered : calyx pubescent ; lobes lanceolate-subulate, as long as 

 the tube or slightly longer : corolla red-purple, 2-2.5 cm. long ; tube with a constriction 

 and ring of hairs within near the base. 



In waste places and along roadsides, Maine to North Carolina and Tennessee. Native of Europe 

 and Asia. Spring to fall. 



18. LEONURUS L. 



Annual, biennial, or perennial caulescent herbs. Leaves opposite : blades flat, toothed 

 or palmately cleft or parted. Flowers in dense axillary clusters. Calyx tubular-campanu- 

 late : tube 5-ribbed, not oblique : lobes 5, about equal, subulate or awn-tipped. Corolla 

 white or pink, 2-lipped : tube included or slightly exserted : upper lip erect, nearly flat 

 or concave : lower lip spreading or reflexed, 3-lobed, the middle lobe broad truncate to 



