Oreacanthus. | XCVIII. ACANTHACE (CLARKE). 177 
1. O. Mannii, Benth. in Benth. et Hook. f. Gen. Pl. ii. 1104. 
Leaves up to 74 by 3 in., acuminate at either end, very slightly hairy, 
especially on the nerves beneath, margin obscurely crenulate ; cystoliths 
subconspicuous on both surfaces ; petiole 0-1 in. long. Panicle up to 
11} by 7 in., with 100-200 flowers; bracts hardly } in. long, linear. 
Calyx } in. long. Corolla mauve or whitish. Capsule 3 in. long.— 
Lindau in Engl. & Prantl, Pflanzenfam. iv. 3 B. 345. 
Upper Guinea. Cameroons: Cameroon Mountain, 7000 ft., Mann, 1259! 
1971! 8000 tt., Johnston, 64! 65! Kalbreyer, 132! Preuss, 1078! 
42. BRACHYSTEPHANUS, Nees; Benth. et Hook. f. Gen. 
Pi. ii. 1105. 
Calyx 5-partite nearly to the base; segments equal, linear. Corolla 
slender, 2-lipped ; tube slender, hardly widened upwards ; lips subentire, 
or the posticous emarginate, the anticous very shortly 3-lobed. Stamens 
2; filaments glabrous, exserted, about as long as the corolla-lips ; anthers 
1-celled, muticous; pollen globose, echinate (stachelpollen), or more 
often nearly smooth with most minute points. Ovary and style 
glabrous ; stigma nearly capitate; ovules 2 in each cell. Capsule small, 
oblong, shortly stalked, normally 4-seeded. Seeds rugose, without 
hairs.—Herbaceous (as noted) up to 5 feet. Leaves entire or nearly 
so. Spikes, or oblong panicles, with many flowers, terminal or axillary, 
more or less hairy; outer bracts (floral leaves) prominent, imbricate, 
or narrow, or (in panicles) small, linear; inner bracts (or bracteoles) 
small, linear, or 0. 
Species 8, viz. the 6 here described with 2 in Madagascar. 
In this genus, as Lindau hints, the pollen is 3-banded in B. longiflorus, Lindau ; 
in other species minutely echinulate, more obscurely banded (always with 3 stopples). 
Spikes elongate, close; floral leaves more or less 
imbricate. 
Floral leaves obovate or elliptic, glabrate 
Floral leaves narrow-oblong, ciliate . . . 
Panicle condensed, linear; flowers scarcely pedicelled. ; 
Floral leaves lanceolate . . . . 3 B. longiflorus. 
Floral leaves linear . . . . . . - 4 B. jaundensis. 
Flowers panicled; flowers pedicelled ; floral leaves and 
bracts minute. 
. B. africanus. 
B, Holstii. 
Ne 
Panicle lax ; sepals 4} in. long, glabrate . 5. B, occidentalis, 
Panicle cylindric; sepals 4 in. long, viscid-pubescent . 6. B. Mannit. 
1. B. africanus, 8. Moore in Trans. Linn. Soc. ser. 2, Bot. iv. 31. 
Nearly glabrous. Leaves up to 64 by 2 in., tapering at both ends; 
cystoliths small, numerous on the lower surface ; petiole 4-2 in. long. 
Spikes up to 7 by } in, strobilate; floral leaves + by} In., obovate, 
acuminate, upper 1-flowered, lower with 3-2 perfect or imperfect 
Owers; bracteoles } in. long, linear-lanceolate. Sepals 6, subequal, 
3-4 in, long, linear, with cystoliths, glabrous, or with a very few short- 
Stalked glands on the margin. Corolla-tube } in. long, linear; lips 
VOL. vy. N 
