814 Labiatae. 
have also a peculiar strong scent, either highly aromatic in many of our 
potherbs, or as disagreeable in several species of Stachys. Distinet, howewer, 
as the whole family is, the genera into which it has been divided are much 
less so than could be wished. ‘Those especially which are allied to: Stachys 
are separated from it by slight differences in the shape of the calyx and 
corolla, which are not always easy to appreciate, 
Among Labiate genera the European, the sweet Basil (Ocymum), 
Lavender (Lavandula), Rosemary (Rosmarinus), Balm (Melissa), Savory 
(Satureia), and Hyssop (Hyssopus), are cultivated among culinary potherbs; 
several species of Coleus, including the Patchouly, in our hothouses; the 
shrubby Phlomis and Leonotis, and the herbaceous Perillas, Monardas, and 
Dracocephalums, and others, in our flower-gardens. 
A. Lavanduleae. — Stamens 4, declined, included, 
Anthers confluent, 1-celled, 
I. Calyx-tube not closely ribbed. 
a) Lower lip of the corolla small, and not 
very concave. . . lel JerOem am: 
b) Lower lip of the éokélWa 1angea concave . Plectranthus. 
II. Calyx-tube with many close ribs ..... 38. Lavandula. 
ne 
B. Satwreieae. — Stamens 4 or 2, equal or the anterior 
longer, distant, divergent or ascending. Anthers 
with 2, parallel or divergent cells. Calyx (in 
ours) 5—10—13-nerved. 
I. Corolla 4-toothed, scarcely if at all, bilabiate 4. Mentha. 
IJ. Corolla bilabiate. 
a) Flowers in ovate or oblong spikes with 
imbricated’ bracts ,< . 6 a. 0) -t 6 oe eat On Orpen: 
b) Flowers in whorls; whorls interrupted . 6, Thymus. 
c) Flowers in axillary cymes. 
1. Calyx small, 5-toothed ....,. . 7. Micromoeria. 
2. Calyx slightly flattened at the upper 
BUNTACE «san, Tacs ad cae an Pi” baat ooes 
©. Monardeae. — Perfect stamens 2, anterior. 
I. Connective astriate the filaments. Inflores- 
ive) 
cence whorled. : q ; . Salvia. 
Il. Connective continuous with the filaments. 
Inflorescence in axillary racemes . .. . + 10. Rosmarinus. 
D. Stachydeae. — Perfect stamens 4, under the upper 
lip, the anterior pair longer, or all enclosed in 
the tube.. Calyx 5—10-nerved. Nutlets dry. 
I. Fruiting-calyx open. Stamens and style in- 
cluded in the corolla-tube . ... +. +. 11. Marrubium. 
