SRE eS eee ae ee a. a aI cape 
Fa Ec I i 
ACANTHACEA. 793 
§Bracts ae ; Spike sessile, or if stalked the — 
naked [p. 
{Calyx 5- le stamens 4 [p. 792] isecceeiscecccceseees ‘on dae 
tOvules not in 2 rows in each cell; corolla-lobes contorted, twisted to 
the left in bud ; lower leaves pinnately cut [p. 792] ...Cardanthera. 
*Seeds supported on hard, upward ¢ curving retinacula ; ovules 2, not 
collateral, or if more than 2 (rarely exceeding 8), superposed in one 
row or else arranged alternately in each cell :—{p. 792 
Corolla without upper lip, lower lip large, expanded, 3-lobed ; ovules 
2 in each cell :— . 
Anterior filaments with an excurrent process ............ Blepharis. 
Anterior filaments without any excurrent process......... Acanthus. 
Corolla with either 2 lips or with 5 subequal lobes :-— 
Corolla-lobes twisted to the left in bud :-— 
Ovules more than two in each cell ; capsules normally with 6 or 
more seeds :— 
Corolla distinctly 2-lipped ..........::seessseeeeseeneeee Hygrophila. 
Corolla subequally 5-lobed :— 
Bracteoles large; capsule clavate with a solid base...Ruellia. 
Bracteoles small, narrow, or none; capsule seed-bearing 
hroughout :— 
ers acuminate at apex .. stresses Achmanthera. 
athers blunt. 0.00000 caves Golo Hemigraphis. 
A 
Ovules 2 in each cell; Sauaiie normally with 4 or fewer seeds ; 
corolla usually subequally 5-lobed :— 
Placentas prosaeay penaapagas from the valves from the base 
upwards ; stamen 
weaetiohes very es reticulately nerved ...... Petalidium 
aieies Phaylapsla, 
Placentas not separating elastically from the valves :— 
Anthers minutely mucronate at the base; stamens 4 
Calophanes. 
Anthers muticous 
Corolla-tube haiep veil limb very little a 
only 2 stamens perfect ..........22.-.ere+++ 
Corolla-tube short, widened gradually from near aia 
base; perfect stamens ; if corolla-tube slender 
below, or if perfect sadiitia oaity 2, then limb of corolla 
idely funnel-shaped .......-6...ssesesereeeeee Strobilanthes. 
Cinclls Johes regia ee bud :-— 
VOvules 3-10 in each cell; capsule normally 6- or more- 
