242 XCVIII. ACANTHACEH (CLARKE). [Schauerta. 
53. SCHAUERIA, Nees; Benth. et Hook. f. Gen. PI. ii. 1116. 
Calyx divided nearly to the base into 5 subequal linear segments. 
Corolla distinctly 2-lipped; tube slender; anticous lip divided deeply 
into 3 oblong lobes; posticous lip subentire. Stamens 2, without rudi- 
ments ; anther-cells 2, oblong, at equal height, rounded at the base; 
pollen ellipsoid, with 3 very narrow smooth bands that do not reach the 
poles. Ovules 2 in each cell; style minutely 2-lobed. Capsule (in the 
American species) stalked; seeds 4, rugose.—Leaves entire. Panicle 
terminal, dense, with many flowers; bracts linear. 
Species 8, Brazilian; besides the one subjoined. 
1. S. populifolia, (. B. Clarke. Herb, 4-5 ft. high, nearly 
glabrous. Leaves 43 by 2} in., elliptic, somewhat parallel-sided, acum! 
nate, when mature glabrate, base rounded cordate ; cystoliths numerous, 
small; petiole 4-3 in. long. Panicle 2 by } in., minutely puberulous; 
bracts } in. long, linear, nearly glabrous, with a very few long-stalked 
glands. Calyx } in. long; lobes subulate, dilated and connate at the 
base. Corolla reddish (Zenker); tube 4 in. long, very slender ; lobes 
tin. long. Filaments glabrous; anther-cells slightly hairy at the top. 
Pistil glabrous. Capsule not seen. 
Upper Guinea, Cameroons: Bipinde, Zenker, 1205! Fernando Po, Mann, 
1426! Vogel! 
54. PERISTROPHE, Nees; Benth. et Hook. f. Gen. Pl. ii. 1121. 
Calyx small ; segments 5, subequal, nearly separate, linear-lanceolate. 
Corolla lips 2, long, posticous entire or emarginate. Stamens 2 ; anthers 
2-celled; cells one more or less above the other, muticous ; pollen 
ellipsoid, with 3 smooth bands and stopples, not tubercled. Ovules 2 1n 
each cell; style filiform, with 2 very short oblong branches. Capsule 
4-seeded, with a cylindric stalk ; placente not rising elastically ; seeds 
discoid, smooth or minutely papillose—Herbs. Leavesentire. Spikelets 
2-1- (rarely 3-) flowered, in heads or scattered; bracts to the 2 lower 
flowers subopposite, enclosing the calyx, from linear to ovate ; bracteoles 
2 to each flower, linear-lanceolate, longer than the calyx. 
Species 20, in the warmer regions of the Old World extending from Cape Verd 
Islands and the Cape to Malaya. This genus in habit andin every point is Dicliptert, 
except that the placentz do not rise elastically from the base of the capsule-valves in 
the ripe fruit. 
Spikelets in more or less lax panicles. 
Panicles 12-18 in. long 1. P. bicalyculata. 
Panicles denser with more numerous spikelets . . 2, P. Hensit. 
Spikelets in spikes. 
Stout ; spikes 3 by 1 in.; corolla #-lin. long . _ 8. P. luteoviridis. 
Small; spikes 1 by + in.; corolla} in. long. . 4 P. usta. 
1. P. bicalyculata, Vees in Wall. Pl. As. Rar. iii. 113. _Glabrous 
or very thinly hispid. Branches up to 2-4 ft. long, 4-7-angular. 
