242 xcviii. ACANTHACE/K (cLARKE). [Sckaueria. 



5o. SCHAUERIA, Nees ; Beiith. et Hook. f. Gen. PI. ii. UK). 



Calyx divided nearly to the base into 5 subequal linear segments. 

 Corolla distinctly 2-lipped ; tube slender ; anticous lip divided deeply 

 into o oblong lobes ; posticous lip subentire. Stamens 'J, without rudi- 

 ments ; anther-cells 2, oblong, at equal height, rounded at the base ; 

 pollen ellipsoid, with o 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, C B. Clarke. Herb, 4-5 ft. high, nearly 

 glabrous. Leaves 4 j by 2| in., elliptic, somewhat parallel-sided, acumi- 

 nate, when matui-e gJabrate, base rounded cordate ; cystoliths numerous, 

 small; petiole ^-J in. long. Panicle 2 by A in., minutely puberulous ; 

 bracts J in. long, linear, nearly glabrous, with a very few long-stalked 

 glands. Calyx | in. long ; lobes subulate, dilated and connate at the 

 base. Corolla reMish. {Zenker)) tube J in. long, very slender ; lobes 

 i in. long. Filaments glabrous ; anther-cells slightly hairy at the top. 

 Pistil glabrous. Capsule not seen. 



Upper Guinea. Cameroons : Bipiude, Zenker, 1205 ! Fernando Po, Mann, 

 1426! Vogel! 



54. PERISTROPHE, Nees; Benth. et Hook. f. Gen. PI. 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 in 

 each cell ; style filiform, with 2 very short oblong branches. Capsule 

 4-seeded, with a cylindric stalk ; placentae not rising elastically ; seeds 

 discoid, smooth or minutely papillose. — Herbs. Leaves entire. Spikelets 

 2-1- (rarely ;:»-) 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 and in every point is Bicliptera, 

 except that the placenta? 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 \. P. Incalycidata. 



Panicles denser with more numerous spikelets . . 2. P. Hensii. 



Spikelets in spikes. 



Stout ; spikes 3 by 1 in. ; corolla §-1 in. long . . 3. P. luteoviridis. 



Small ; spikes 1 by :^ in. ; corolla \ in, long . . 4. P. usta. 



1. P. bicalyculata, Nees in Wall. PL As. liar. iii. 113. Glabrous 

 or very thinly hispid. Branches up to 2-4 ft. long, 4-7 -angular. 



