Acanthopale.] xrviii. acanthace^ (clarke). 65 



►Spikes terminal, 2 i by 1 in., dense, fi-l -flowered, nearly glabrous; 

 bracts |-f in. long, elliptic. Sepals 5, equal, J-J in. long, linear-oblong, 

 minutely sparsely setose. Corolla 1 in. long or more. Stamens 4, sub- 

 similar ; anther-cells 2, parallel, long, rounded at the base ; pollen 

 strongly echinate. Ovary glabrous. — Dischislocalyx Buchholzii, Lindau 

 in Engl. Jahrb. xx. 14, and in Engl. & Prantl, Pflanzenf. iv. 3B. 307. 



lower Guinea. Gaboon : Buchholz ! 



18. WHITPIELDIA, Hook.; Benth. et Hook. f. Gen. 

 PI. ii. 1085. 



Calyx divided nearly to the base» longer than the bracteoles, petaloid 

 in texture, softly hairy ; segments 5, subequal, narrow-oblong. Corolla 

 large ; tube linear and very long, or shorter and dilated nearly from the 

 base; lobes 5, subequal, contorted in bud, subequal. Stamens 4,subsimilar; 

 anthers linear-oblong, muticous; pollen globose, nearly smooth (with 

 minute tubercles) ; stopples 2. Ovary glabrous, 2 ovules in each cell ; 

 style articulated close above the ovary and more or less widened at the 

 base, or continuous at base and ovary-top tapering into it ; stigma capi- 

 tate, obscurely 2-lobed. Capsule stalked, 2- or 4-seeded, glabrous ; seeds 

 discoid, without hairs, nearly smooth. — Shrubs, 2-20 ft. high, nearly 

 glabrous except the inflorescence. Leaves elliptic, acuminate at both 

 ends, petioled, margins entire. Inflorescence terminal, simple or 

 branched, racemose or spicate or more or lesspanicled ; flowers pedicelled 

 (usually j-J in.) above the bract ; bract large or small, ovate or linear, 

 often caducous ; bracteoles large, ovate, membranous or subcoroUoid. 



Species 9, endemic. 



The articulation at the base of the style is a remarkable character in the 

 AcanthacecB, and Bullion hastened to found his genus Stylarth/ropus thereon, without 

 examining the two old species of Whitfieldia, which also have this articulation. 

 Lindau, following, leaves the two old Whitjieldias in that genus, and creates two 

 new species of Stylarthropus which do not possess the articulation. 



Linear part of corolla-tube 1-2 in. long. 

 Bracteoles glabrous. 



Bract green persistent; corolla glandular . . 1. W. elongata. 



Bract caducous ; corolla finely hairy . . . 2. W. perglahra. 



Bracteoles viscid-hairy. 



Leaves closely dotted on the upper surface 3. W. longifolia. 



Leaves not or very obscurely dotted. 



Bract caducous ; panicle open . . . 4. W. subviridis. 



Bract large, green ; flowers spicate . . 5. W. tanganyikensit. 



Linear part of corolla-tube •§— 5 in. long-. 

 Bracts ^-\ in. long, linear. 



Bracteoles pubescent 6. Tf. lateritia. 



Bracteoles scarcely puberulons . . 1. W. Preti.isii. 



Bracteoles glabrous 8. 7F. Brazzei. 



Bracts |-| in, long, lanceolate ; innovations stellate- 

 hairy ........ 9' W". Stvhlmanni, 



