LAMIACEAE 1029 
1. Synandra hispidula (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 Tetràhit L. Stems 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. iong: nutlets 
about 3 mm. long. 
In waste places, Newfoundland to Alaska and North Carolina. Nativeof 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. amplericaute. 
All leaf-blades petioled, blotched in the center: corolla 2-2.5 cm. long. 2. L. maculatum. 
1. Lamium amplexicaüle L. Biennial, sparingly pubescent. Stems 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 maculàtum 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 
