LABIATE. XXII. COLEBROOKIA. XXIII. PERILLA. XXIV. ISAMHCS. XXV. PRESLIA. 



'15 



Shrubby Tetradenia. Shrub. 



Cult. For culture and propagation see Erlope, p. 708. 



XXII. COLEBROO'KIA (named in honour of Henry 

 Thomas Colebrooke, F.R.S., F.L.S., &c., an accomplished 

 botanist.) Smith, esot. bot. 2. p. 111. Benth. lab. p. 165. 



LIN. STST. Didynamia, Gymnospermia. Calyx campanu- 

 late, equal, 5-parted, plumose, pappous at maturity, adhering 

 to the achenia. Corolla with the tube equalling the calyx : the 

 limb very short, nearly equal, 4-cleft : upper lobe emarginate. 

 Stamens 4, equal, distant ; filaments very sliort; anthers nearly 

 sessile, 2-celled : cells parallel. Disc of ovarium equal, gland- 

 less. Style deeply bifid : lobes subulate, stigmatiferous in the 

 upper part. Shrubs, densely clothed with whitish or subrufous 

 woolly tomentum. Leaves petiolate, 4-6 inches long, oblong- 

 elliptic, crenulated ; lower floral leaves similar, but smaller : 

 upper ones bractea-formed, imbricate before florescence. Spike- 

 lets 1-3 inches long, pedunculate, panicled. Cymes of whorls 

 distinct, head-formed, dense, sessile, involucrated by bracteas 

 which are connate at the base. Flowers small, white. Corolla 

 tubular, contracted in the middle. 



1 C. OPPOSITIFOLIA (Smith, 



exot. bot. 2. p. 111. t. 115.) FIG. 75. 



branches, leaves, and spikes 

 opposite. '- . >. Native of 

 Nipaul and Kamaon. Els- 

 holtzia oppositifolia, Poir. 

 suppl. 5. p. 663. (fig. 75.) 



Opposite-hated Colebrookia. 

 Fl. ? Clt. 1820. Shrub 3 to 

 4 feet. 



. TERNIFOLIA (Roxb. CO- 



rom. 3. p. 40. t. 245.) branches, 

 leaves, and spikes, 3 in a whorl. 

 f- . S. Native of the East In- 

 dies, among the Carnatic moun- 

 tains, Roxb. Leaves more to- 

 mentose, and on shorter peti- 

 oles than the first species, and 

 the spikelets are more dense. 



Tern-leaeed Colebrookia. Clt. 1823. Shrub 3 to 4 feet. 



Cult. For culture and propagation see Erlope, p. 708. 



XXIII. PERI'LLA (meaning unknown to us.) Lin. gen. 

 57S. Benth. lab. p. 166. 



LIN. STST. Didynamia, Gymnotpermia. Calyx campanulate, 

 nearly equal at the time of florescence, 5-cleft, nutant after 

 florescence, and bilabiate : upper lip dilated, trifid : middle 

 tooth the smallest : lower lip bifid ; throat naked inside. Co- 

 rolla almost equalling the calyx, nearly equal ; limb shortly 5- 

 cleft. Stamens 4, nearly equal, distant, erect, equalling the 

 corolla ; anthers 2-celled : cells parallel, at length diverging, or 

 sub- divaricate. Style deeply bifid ; stigmas terminal. Achenia 

 dry, smooth. An herb, with the inflorescence almost of the 

 genus Moschosma, and with the flowers disposed in axillary and 

 terminal secund spikes. 



1 P. OCYMOIDES (Lin. gen. 578. Sims, bot. mag. 2395.) . 

 H. Native of Silhet, Kamaon, Nipaul, and Ava. O'cymum 

 frutescens, Lin. spec. p. 832. Melissa maxima, Arduin. spec. 

 2. p. 28. t. 13. Mentha perilloides, Lam. diet. 4. p. 112. but 

 not of Lin. Stem pilose, bluntly tetragonal. Leaves petiolate, 

 5-4 inches long, ovate, acuminated, coarsely serrated, cuneated 

 at the base, or narrowed into the petioles, green on both sur- 



faces, pilose on the veins. Racemes shorter than the leaves. 

 Corolla minute, white. 



BatU-uke Perilla. Fl. July, Aug. Clt. 1770. PI. 1 to 3 

 feet. 



Cult. Sow the seeds in the open ground, where the plant 

 will thrive without any further care. 



XXIV. ISA'NTHUS (from troc, itot, equal; and axfloc, 

 anthos, a flower ; in allusion to the corolla being regular, not 

 bilabiate.) Michx. fl. bor. amer. 2. p. 3. Benth. lab. p. 166. 



LIN. SYST. Didynamia, Gymnotpermia. Calyx campanulate, 

 equal, 10-nerved, deeply 5-toothed ; throat naked inside. Co- 

 rolla hardly exceeding the calyx, with a short, straight tube, 

 and a campanulate limb : lobes 5, equal, roundish, spreading. 

 Stamens 4, nearly equal, distant, erect, about equal in length to 

 the corolla ; anthers 2-celled : cells parallel, or at length diverg- 

 ing. Style shortly bifid at apex : lobes subulate ; stigmas 

 terminal. Acbenia dry, obovate, reticulated, lacunosely wrink- 

 led. A herb with the habit and inflorescence of Satureia 

 hortensit. 



1 I. CERIJ'LECS (Michx. fl. bor. amer. 2. p. 4. t. 30.) 0. 

 H. Native of North America, in Pennsylvania, Maryland, and 

 Virginia, Nutt. ; Carolina and Kentucky, Michx. ; at St. Louis, 

 Drummond. Trichostema bracbiata, Lin. spec. 834. Plant erect, 

 branched, rather viscid ; branches pubescent, or pilose. Leaves 

 on short petioles, oblong-elliptic, narrowed at both ends, with 

 quite entire, or sub-sinuated edges, 3-nerved, green on both 

 surfaces, glabrous, but usually pubescent, or pilose. Peduncles 

 solitary, axillary, 1-flowered, shorter than the leaves, usually 

 bibracteate under the calyx. Corollas like those of Mentha, 

 pale blue. 



fifee-flowered Isanthus. Fl. July, Aug. Clt. 1818. PI. J 

 to 1 foot. 



Cult. The seeds should be sown in spring in a peat border, 

 where the plants will flower and produce seed if the summer 

 prove warm. 



XXV. PRE'SLIA (named in honour of C. B. and J. S. Presl. 

 of Prague, brothers ; authors of " Flora Sicula, Dilicia? Pragen- 

 sis, &c.") Opiz. in bot. zeit. 1824. 1. p. 322. Benth. lab. p. 

 167. but not of Mart. 



LIN. SYST. Didynamia, Gymnotpermia. Calyx ovate, equal, 

 4-toothed ; teeth awned ; throat rather villous inside. Corolla 

 equal, with an inclosed tube, and a 4-parted limb ; lobes equal, 

 entire. Stamens 4, equal, distant, erect ; filaments glabrous ; 

 anthers 2-celled : cells parallel. Style bifid at top ; lobes nearly 

 equal, bearing the stigmas at apex. Achenia oblong, smooth, 

 diy. A bog herb, with the habit of Satureia. and the inflores- 

 cence of Mentha rerticillata. 



1 P. CERVI'XA (Fresen. in syll. pi. soc. ratisb. 2. p. 238.) 

 It. H. Native of Middle and South Europe, in bogs and 

 ditches; as of the South of France, Spain, and Portugal. Mentha 

 cervina, Lin. spec. 807. Mentha punctata, Moench. Pulegium 

 cervinum, Mill. diet. no. 3. Pulegium angustifblium, Riv. 

 mon. irr. t. 23. f. 2. Preslia glabriflora, Opiz, in bot. zeit. 

 1824. 1. p. 323. Preslia villiflora, Opiz, 1. c. Herb prostrate, 

 glabrous. Leaves sessile, linear, or linear-lanceolate, obtuse, 

 quite entire, green on both surfaces, dotted, somewhat fascicled 

 in the axils. Whorls many-flowered, dense, distant, rather 

 shorter than the floral leaves. Corollas pale purplish, about 

 twice as long as the calyxes. 



Stag Preslia. Fl. June, Aug. Clt. 1684. PI. prostrate. 



Cult. This plant will grow freely in most soils, and is readily 

 increased by division. It requires a little protection in severe 

 frost. 



4 T 2 



