1226 ACANTHACEAE 
e „mucronate or aristulate at the base: 
corolla with a short tube and a campanulate 
throa 4. DYSCHORISTE. 
Anther-sacs rounded at the base: corolla with a 
A tube and a funnelform or campanulate 
5. RUELLIA. 
Corolla imbricated in the bud. 
Reus : anthers 1-celled. 6. GERARDIA. 
nod $ anthers 2-celled. 
"Antec saes parallel, closely contiguous. 
Corolla strongly '2-li pped. T. DIAPEDIUM. 
Corolla pee 2- pee ed. 8. YEATESIA. 
mr -sacs separated on a dilated connective. 
er-saes piae similar in size and shape, 
"the lower sac short-stalked. 9. DIANTHERA., 
Anther-sacs dissimilar, more or less unequal, 
and the lateral one, at least, pointed at the 
base, sessile, 0. JUSTICIA. 
THUNBERGIA L. f. Climbing vines (ours). Leaf-blades more or 
less nsns or sagittate and toothed. Flowers on axillary rA sub- 
tended by a paif of foliaceous bracts. Me persistent: lobes 10-16, ow. 
Corolla sean with a short tube, ong throat, and a limb d 5 
broad lobes. s 4, didynamous. NM subtended by the persistent 
bracts, with a pron body and a flat beak.—About 40 species, in the Old 
World tropies s.-Sum, or all year S. 
Petioles wing-mar £ined: corolla yellow or ochroleucous, with a purple eye: ous 
eak ape longer than the body. 1. T.alat 
Petioles not ng-margined: corolla white: capsule-beak much 
longer than the body. 2. T. fragrans. 
1. T. alata Bojer. Leaf-blades a -ovate to hastate, 3-11 cm. long, 
undulate or sinuate-toothed, cordate a e base: calyx-lobes subulate, mostly 
10-12, se i than the tube e: coro mi 
2.5-3. oe wide, the ae rounded o 
dulate: emi beak somewhat longer "than 
the re iameter of the body.—(BLACK-EYED 
SUSAN.)—Prairies, roadsides, and  waste- 
e. Fla. Nat. of Afri 
2. T. fragrans Roxb.  Leaf-blades rd 
late to d piece toothed near the bas 
and more o 11 em. lo 
truncate to cordate at the base: calyx-lobes 
e, 12-16, un about half a 
ody. ) Fen Eur 
rows, d. waste- -places, and prece Fla. Nat. of Asia. 
2. TUBIFLORA J. F. Gmel Rigid herbs with several basal leaves and 
flower stems with many rigid sheathing seales. Flowers in terminal spikes, 
subtended i braetlets somewhat shorter than the calyx. Calyx-lobes glumace- 
ous, 4 or 5, the lateral ones the narrower. Corolla white or Bas slightly 2- 
lipped. [Elytraria Vahl.]—About 10 species, Americ 
Basal leaves more or less spreading: blades narrow and elongate. 1. T. angustifolia. 
Basal leaves erect; blades broad and relatively short. 2. T. carolinensis. 
