492 DIDYNAMIA. Class XIV* 
1273. Pycnanthemum. Involucre of many bractes beneath the little heads. Cal. tubular, striated. Upper 
hp of corolla nearly entire; lower trifid. Stamens nearly equal. 
1274. Origanum. Cone 4-cornered, spiked, collecting the calyxes. Upper lip of corolla erect, flat : lower 
3-parted, with nearly equal segments. 
1275. Thymus. Orifice of bilabiate calyx closed with hairs. Upper limb of corolla flat, emarginate. 
1276. Acynos. Cal. 2-lipped, furrowed, hispid, gibbous at base, villous at orifice. Cor. ringent, inflated at 
orifice, with the upper lip erect, emarginate ; the lower 3-parted, spreading : intermediate segm. concave. All 
the stamens fertile. 
1277. Calamintha. Cal. after flowering closed by hairs. Orifice of cor. inflated. Upper lip emarginate : 
lower 3-parted, with the intermediate segment entire, subemarginate or crenulate. 
1278. Melissa. Cal. dry, flattish above, with the upper lip somewhat fastigiate. Upper lip of cor. somewhat 
vaulted, 2-fid : lower less, with middle lobe cordate. 
1279. Dracocephalum. Cor. inflated at orifice, with the upper lip concave. 
1280. Melittis. Cal. smooth, campanulate, blunt, oblique at orifice. Upper lip of cor. flat ; lower crenate. 
Anthers cruciate. 
1281. Ocymum. Cal. with the upper lip orbicular ; lower 4-fid. Corolla resupinate, with one lip 4-cleft, the 
other undivided. Exterior filaments having a process at their base. 
1282. Plectranthus. Upper lip of cal. largest. Corolla resupinate, ringent, with the tube gibbous upwards, 
or spurred. 
1283. Trichostema. Upper lip of cor. falcate. Stamens very long. 
1284. Prostanthera. Calyx 2-lipped, in fruit closed. Tube striated, lips undivided, blunt. Corolla ringent, 
with a half bifid helmet : middle segment of lower lip large, 2-lobed. Anthers spurred beneath. 
1285. Scutellaria. Cal. entire, after flowering closed with a lid. Tube of the corolla elongated. 
1286. Prunella. Upper lip of calyx dilated. Filaments forked, upon one point bearing their anthers. Stigma 
bifid. 
1287. Cleonia. Filaments forked, upon one point bearing their anthers. Stigma bifid. 
1288. Prasium. Cal. campanulate, 2-lipped. Upper lip of cor. vaulted ; lower trifid, with the middle segm. 
largest cordate. Grains berried. 
1289. Phryma. Cal. 2-lipped, S-toothed. Grain only one. 
Order 2. ANGIOSPERMIA. 
Seeds several, enclosed in an undivided pericarpium. 
I. Ovary inferior, or nearly inferior. 
1290. Gesneria. Cal. 5-fid. Corolla incurved and recurved. Capsule 2-celled. 
1291. Gloxinia. Cal. 5-leaved. Cor. campanulate, with an oblique limb. Filaments with the rudiment of a 
fifth inserted upon the receptacle. 
1292. Linncea. Cal. double : of the fruit 2-leaved ; of the flower 5-parted. Cor. campanulate. Berry dry, 
3- celIed. 
II. Ovary superior, polypetalous. 
1293. Melianthus. Cal. 5-leaved, with the lower leaflet gibbous. Petals 4, with the nectary below the lowest. 
Capsule 4-celled. 
III. Ovary superior, monopetalous. 
A. Filaments 5, the upper only rudimentary. 
1294. Bignonia. CaL 5-fid, cup-shaped. Cor. campanulate, 5-fid, ventricose beneath. Pod 2-celled. Seeds 
with membranous wings. 
1295. Jacaranda. Cal. 5-toothed. Cor. tubular at base, with a dilated throat, and a 5-lobed unequal limb. 
Fifth filament sterile, long, villous at end. Stigma with two lips. Capsule large, round, woody, with the edge 
dividing into two valves. 
1296. Sesamum. Cal. 5-parted. Cor. campanulate 5-fid, with the lower lobe largest. Stigma lanceolate 
Capsule 2-celled, the cells divided in two by the inflexed edges of the valves. 
1297. Pentstemon. Cal. 5-leaved. Cor. 2-lipped, ventricose. Fifth filament longer than the rest, and bearded 
at its upper end. Capsule compressed, 2-celled, 2-valved. Seeds numerous, subglobose. 
1298. Chelone. Cal. 5-parted, with two bractes. Cor. ringent, ventricose. Fifth filament shorter than the 
others. Caps. 2-celled, 2-valved. Seeds numerous, with a membranous edge. 
1299. Tourretia. CaL 2-lipped. Corolla ringent : the upper lip galeate, large ; lower 2.toothed, very small. 
Nectary annular, 4-lobed. Stigma truncate. Capsule 4-celled. Dissepiments with i wings. Seeds cordate. 
1300. Martynia. Cal. 5-fid. Cor. ringent. Capsule woody, coated, with a hooked beak, 4-celled, 2-valved, 
B. Filaments 4. Capsule many-seeded, opening with elasticity. Seeds large, flat. 
* Calyx bifid. 
1301. Acanthus. Cal. 4-parted : the two lateral inner segments short ; the two outer long, with 3 bractes, of 
which the middle one is toothed, spiny. Cor. labiate, having the orifice closed with hairs. Lower lip very 
large, 3-lobed. Anthers villous. Stigma bifid. Caps, ovate, with 1-2-seeded cells. 
** Calyx i-fid. 
1302. Barleria. Cal. 4-parted. Stamens 2, much smaller than the others. Capsule with 4 angles, 2-celled, 
2-valved, elastic, without claws. Seeds 2. 
*** Calyx 5-fid. 
1303. Phaylopsis. Calyx unequal, with a large dorsal segment. Cells of the ovary 2-seeded, with the seg- 
ments of the dissepiment spontaneously dividing in two. Otherwise like Blechum. 
1304. Ruellia. Cal. 5-parted, generally with two bractes. Corolla campanulate, with a 5.1obed limb. Sta- 
mens in pairs. Capsule narrowed to each end. Teeth opening elastically. Seeds not many. 
1305. Blechum. Cal. 5-parted, equal. Cor. funnel-shaped. Capsule about 2-celled, 2-valved : the segments 
of the crosswise dissepiment finally becoming loose. Seeds many, with hooks. 
1306. Aphelandra. Cal. 5-parted, unequal. Cal. 2-lipped. Anthers 1-celled. Capsule 2-celled, 2-valved, 
with a dissepiment crosswise. Seeds with hooks. 
1307. Crossandra. Cal. 5-parted, unequal. Cor. 1-lipped. Stamens included. Anthers 1-celled. Capsule 
2-celled. 2-valved, with a dissepiment crosswise. Seeds with hooks. 
**** Calyx multifid. 
1308. Thunbergia. Cal. double : outer 2-leaved ; inner about 12-toothed. Cor. campanulate. Capsule beaked, 
2-celled. 
C. Filaments 4. Capsule, drupa, or berry few seeded. Seeds erect. 
* Calyx bifid. 
1309. Hebenstreitia. Cal. spathaceous, opening lengthwise beneath. Cor. tubular, unequal, with one upper 
4- fid lip. Stamens projecting from the lower cleft of the corolla. Caps. 2.seeded. 
