590 LABIATE. 



Hyssopus officinalis, Linn., the Hyssop of the Old World, which has sparingly escaped from 

 gardens to roadsides at the East, has once been received from Plumas Co., California ; but prob- 

 ably it is not there naturalized. 



Nepeta Cataria, Linn., the Catnip, and perhaps N. Glechoma, Benth., the Ground Ivy, 

 also Galeopsis Tetrahit, Linn., the Hemp-Nettle, Leonuuus Cardiaca & L. Sibiricujs, 

 Linn., Motherwort, and Lamium amplexicaule, Linn., &c., Dead-Nettie, — weeds from the Old 

 World, — are to be expected in C'alifornia, but apparently have not yet found their way thither. 



L Nutlets not reticulated, quite distinct and attached at the very base : corolla not more deeply 

 cleft down the upper side. 



Tribe L OCIMOIDEiE. Stamens declined towards or resting upon the lower lip of the 

 corolla, all four fertile. Corolla declined, the 4 somewhat equal lobes forming the upper 

 lip, and the fifth dissimilar one the lower. (Ocimum Basilicum, Linn., the Sweet Basil, 

 cultivated as a sweet herb, is the type of this tribe.) 



1. Hyptis. Calyx 5-toothed. Lower lobe of the corolla saccate, abruptly deflexed at the base. 



Tribe IL SATUEEIEyE. Stamens erect or ascending ; the posterior pair shorter or wanting : 

 anthers 2-celled, and the short cells never far separated, sometimes partly confluent but not 

 blended. LTpper lip of the corolla never hooded : all the lobes flat or flatfish. 



* Corolla (small and short) about equally 4-lobed and calyx 4 - 5-toothed : tube naked within. 



2. Mentha. Stamens 4, nearly equal, erect, straight and distant. 



3. Lycopus. Stamens 2 with anthers : the posterior pair sterile or wanting. 



* * Corolla with border bilabiate, and no hairy ring within the base of the tube. 

 -1- Calyx about equally 5-toothed and 13-nerved: style beardless. 



4. Pycnanthemum. Flowers glomerate-cai)itate. Stamens 4, straight, distant and divergent : 



aiitlii r-cells parallel. Corolla-lips and lobes short. 



5. Mouardella. Flowers glomerate-capitate. Stamens 4, straight, exserted : anther-cells at 



li!ii,^tli divergent. Corolla-lobes narrow. 



6. Micromeria. Flowers solitary or loosely clustered in the axils. Stamens 4, curving and 



ascending, shorter than corolla. 



+- -f- Calyx distinctly Inlabiate : style beardless. 



7. Calamintha. Flowers scattered or loosely clustered. Stamens 4, the shorter pair sometimes 



sterile, conniving in pairs or ascending parallel. 



-1 — 1-4- Calyx unequally and deeply 5-cleft, mostly 15-nerved: style bearded above. 



8. Pogogyne. Stamens 4, sometimes the upper pair sterile, ascending. 



* * + Corolla not manifestly bilabiate : a hairy ring at the base of the tube within. 



9. Sphacele. Calyx campanulate, deej^ly and nearly equally 5-toothed, membranaceous and 



enlarging in fruit, only 10-herved, reticulated. Stamens 4, distant. Corolla with 

 5 roundish lobes, the lower longest. 



Tribe III. MONAEDE^E. Stamens only 2 fertile, the upper pair rudimentary or wanting : 

 anthers apparently or really of a single linear-oblong cell, or of 2 cells very widely sepa- 

 rated upon the two ends of a filament-like connective. 



10. Salvia. Connective longer than the filament itself, which it strides, a naiTow anther-cell at 



its iqiper end, a smaller one or a long process at the lower. 

 IL Audibertia. Connective much shorter than the filiform filament and continuous or barely 



articulated with its apex, or apparently none : anther 1-celled, no rudiment of the second 



cell below. 



Tribe IV. NEPETEiE. Stamens all four with good anthers, ascending or divergent ; the 

 posterior pair sui'passing the anterior. Corolla distinct!}'' bilabiate : calyx 15-nerved. 

 (Nepeta, the type of this tribe, would be expected to give two European weeds, the Cat- 

 nip and Ground Ivy ; but they have not yet been seen in collections.) 



12. Lophauthus. Calyx 15-nerved, 5-toothed. Stamens divergent, the pairs crossing : anther- 

 cells parallel. 



Tribe V. STACHYDE^E. Stamens all 4 with good anthers, a.scending and parallel under 

 the concave or galeate upper lip of the corolla. Calyx 5 -10-nerved. Herbage much less 

 aromatic than in the preceding tribes, the glandular dots or oil-glands scanty. 



* Anthers of the longer pair of stamens with one cell abortive or wanting, as also is the upper 

 fork of the style : embryo curved ; the short radicle resting against one of the cotyledons : 



