Acanthopale. | XCVIII. ACANTHACEE (CLARKE). 63 
mostly on short axillary branches; bract as long as the calyx, oblong or 
obovate, green; bracteoles shorter than the calyx, oblong. 
Species 7 in Tropical Africa, 1 in Madagascar, 1 (at least) in South India. 
This genus comprises the African Strobilanthes of the Genera Plantarum. The 
species of Strobilanthes, alone retained in that genus by Lindau, have ribbed pollen. 
Acanthopale is Dischistocalyx, Lindau (not of Anderson nor Jistichocalyx, Benth.), 
and also comprises Pseudostenosiphonium gardnerianum, Lindau. The genera carved 
out of Strobilanthes on the pollen-character are articificial ; the few African species of 
Strobilanthes go, however, well together. Psewdostenosiphonium of Lindau differs by 
having only 2 stamens. 
Inflorescence lax ; flowers (other than the subterminal) 
solitary. 
Nearly (including bracts and calyx) glabrous. 
Leaves more than 3 in. long. 
Racemes lax ; filaments hairy . . . . 1. A, laxiflora, 
Racemes closer ; filaments glabrous . . . 2, A. decempedalis. 
Leaves hardly 14 in. long. Flowers all axillary, ; 
scattered . . . . . . . 3. A. azaleoides. 
Innovations hispid. 
Mature leaves nearly glabrate  . . . . . 4, A. albosetulosa, 
Mature leaves hairy on both faces . 5. A, pubescens. 
Flowers crowded. (Leaves up to 8-9 in. long.) . 
Heads of flowers on short axillary branches, hispid . 6. 4. conferti flora. 
Spikes terminal, dense, nearly glabrous . . . 7. A. Buchholzir. 
1. A, laxiflora, (. B. Clarke. Nearly glabrous. Leaves 8 by 2 in., 
tapering caudate at both ends, crenate; petiole up to 1} in. long. 
mes axillary, 2-3 in. long, with few distant flowers ; bract 3 in. 
long, oblong ; bracteoles } in. long, oblong. Calyx-segments } in. long, 
oblong; corolla-tube 3 in. long, funnel-shaped nearly from the base. 
‘aments very hairy; anthers glabrous, rounded at the base. Style 
hairy.—Dischistocalys laxiflorus, Lindau in Engl. Jahrb. xx. 13, in Engl. 
& Prantl, Pflanzenf. iv, 3B, 307, and in Engl. Pf. Ost-Afr. C. 368. 
Upper Guinea, Cameroons: Buea, 3900 ft., Preuss, 947 ! 
0b Dist. German East Africa; Usambara; in Magamba Forest, Holst, 
2. A, decempedalis, (. B. Clarke. Shrub 10-12 ft. high (ann). 
wes 7 by 2} in., tapering acute at both ends, sparsely hairy, crenate ; 
petiole up to # in, long. Racemes axillary, 1} in. long, 2-4-flowered ; 
Tact } in, long, spathulate-oblong ; bracteoles and calyx-segments } in. 
long, oblong, nearly glabrous. Corolla-tube 3 in. long, funnel-shaped 
nearly from the base. Filaments glabrous; anther-cells glabrous, 
rounded at the base. Style hairy, with one linear-oblong branch ; cells 
t the ovary 2-ovulate. 
Upper Guinea. Fernando Po, 7000 ft., Mann, 2347! 3747! 
3. A. azaleoides, (’. B. Clarke. A nearly glabrous, azalea-like bush 
(H. ‘ Johnston). Leaves up to 1} by $ in., obscurely crenate, Up 
obtuse, base tapering; petiole hardly any. Flowers scattered, axillary, 
Solitary ; bract 4-1] in. long, obovate; bracteoles } in. long, narrow- 
ong. Calyx-segments } in. long, narrow-oblong, minutely pubescent. 
orolla white (H. H. Johnston); tube % in. long, funnel-shaped nearly 
