376 
MELISSA, MOLLUGO. 
6 to 10 times as long as the longest leafet at its base: legumes oral. 
3 to 6 f. Probably introduced ; but now very common and growing 
wild. S. 
13—1. MELISSA. 42. 39. 
Exotic. 
ojficina'lis, (balm. w. b. Ju. 7]..) flowers whorled half way round, sub-ses- 
sile ; bracts oblong, pedicelled ; leaves ovate, acute, serrate. Natu- 
ralized. 
20—13. MENISPERMUM. 11. 77. 
canaden"se , (moonseed. O. y. Ju. 7)..) leaves peltate, cordate, round-angu- 
lar; racemes compound ; petals 0. S. 
13—1. MENTHA. 42. 39. 
Exotic. 
piperi'ta, (peppermint, p. Au. 7J..) spikes obtuse, interrupted below ; leaves 
subovate, somewhat glabrous, petioled ; stem glabrous at the base. Na- 
turalized. 1 — 2 f. 
vir"idis , (spear-mint. p. Au.) leaves lanceolate, sessile ; spikes elongated, 
interrupted ; stamens long. 1 — 2 f. 
11—5. MESEMBRYANTHEMUM. 13. 87. 
Exotic. 
crysialli'num ^ (ice plant, w. Au. ©.) branching; leaves alternate, ovate, 
papillose ; flowers sessile : calyx broad-ovate, acute, retuse. 
17—1. M IRANI A. 49. 55. 
pubes'cens , (w-p. S. 2j..) stem climbing, pubescent : leaves cordate, acu- 
minate, angularly dentate, pubescent on both sides ; divaricate, equal. S. 
13—2. MIMULUS. 40. 40. 
ringens , (monkey-flower. O. b. Ju. Tj..) erect, glabrous ; leaves sessile, 
lanceolate, acuminate, serrate; peduncles axillary, opposite, longer 
than the flower; teeth of the calyx acuminate. 1 — 2 f . 5. 
5—1. MIRABILIS. 54. 32. 
Exotic. 
jal 'apa , (four o’clock, r. y. Ju. Tj.) flowers heaped, peduncled ; leaves 
glabrous. 
4—1. MITCHELLA. 48. 57. 
re'pens , (O. w. Ju. 7|_.) stem creeping, branched ; leaves, smooth, roundish, 
opposite. Woods. S. 
10—2. MITELLA. 13. 84. 
dipliyl’la. (O. w. M. Tj..) leaves somewhat lobed ; lobes acute, dentate; 
stem erect, with 2 opposite leaves above the middle. 12 — 18 i. 
13—1. MOLUCCELLA. 42. 39. 
Exotic. 
lae'vis, (molucca balm, shell-flower, w-g. Ju. ©.) calyx campanulate, 5- 
toothed ; teeth equal, awnless; leaves petioled, round-ovate, toothed. 
3—3. MOLLUGO. 22. 82. 
verlicUla'ta , (carpet weed. O. w. Ju. <£>.) leaves verticillate, wedge-form, 
acute ; stem brauched, depressed ; peduncles 1-flowered. S. 
