62 xcviii. ACANTHACE.fi (clarke). [Distichocah/x. 



texture; petiole f in, long. Heads f in. long, ovoid, 2-9-flowered ; 

 bract J in. long, ovate. Calyx h in. long, or rather more ; otherwise 

 as D. strobilinics. — Dischistocalyx sp., Lindau in Engl. Jahrb, xviii. 08, 

 t. 1, fig. 20. 



Jbower Guinea. Gaboon : Corieco Bay, JJanri, 1863 1 



With only one colleciion of each number, it is difficult to guess whether the present 

 is '* specificallj " distinct from J), strob'dinui. T. Anderson and Beniham took it to 

 be 80. 



7. D. brevifolius, C. B. Clarke. Nearly glabrous, " herbaceous, 

 2 feet" {Mann). Leaves H by f in., acuminate at either end, tip 

 obtuse, base produced nearly to the foot of the petiole, somewhat 

 leathery. Heads of 2-4 flowers only. Calyx exceeding h in. long. 

 Corolla light blue {Mann). Flowers, pistil, stamens, pollen, as of the 

 last 2 species. 



Xiower Guinea. , Gaboon : Sierra del Crystal, Mann, 1665 ! 

 This, though very closely allied to the preceding two species, appears distinct from 

 either. 



8. D. thunbergiiflorus, Benth. in Benth. d; Hook.f. Gen. PI. ii. 1081 . 

 Glabrous (calyx-tips microscopically pubescent). Stem 4-20 ft. high 

 {Mann). Leaves up to by 2 in., acuminate at either end, cystoliths 

 many prominent ; petiole J-IJ in. long. Spikes terminal, elongating 

 in fruit up to 3 in., 4-10-flowered, lower flowers solitary, opposite, 

 J-'L in. from the succeeding pair ; bract |-1 in. long, elliptic, deciduous ; 

 bracteoles hardly \ in. long, narrow-oblong. Calyx-lobes 5, J in. long, 

 nearly equal, linear-lanceolate ; the 3 posticous sometimes connate even 

 in fruit J their length, sometimes free even in the bud nearly to theii- 

 base. Corolla 2 in. long, upper J of the tube much inflated, J-| in. in 

 diam., curved ; lobes J in., round, violet-purple. Filaments glabrous, 

 with glands near the top ; pollen globose, echinate. Ovary and style 

 f^labrous ; style-branches one obsolete, one broad ovate-oblong. Capsule 

 .3 \yy -|-J^ in., subcylindric, about 10-seeded, seed-bearing from the 

 base ; seeds j\- in. in diam. — Ruellia thunbergice/J.ora, T. Anders, in 

 J our n. Linn. Soc. vii. 24; Lindau in Engl. & Prantl, Pflanzenf. iv. 

 3B. 810. 



upper Guinea. Fernando Po, 1300-2000 ft., Mann, 316 ! 1446 ! 



17. ACANTHOPALE, C. B. Clarke. 



Calyx divided nearly to the base; segments 5, subequal, narrow- 

 oblong or linear. Corolla 1-1 J in. long; tube dilated nearly from the 

 base, funnel-shaped ; lobes 5, short, subequal, contorted in bud. 

 Stamens 4, subsimilar ; anther-cells 2, linear-oblong, parallel, at equal 

 height, glabrous, base rounded ; pollen globose, echinate. Ovary glabrous ; 

 ovules 2 in each cell ; style hairy, one branch linear-oblong, the other 

 minute or 0. Capsule broad-oblong, contracted, solid at the base ; seeds 

 with many hygroscopic hairs. — Shrubs. Leaves entire, more or less 

 crenate, becoming nearly glabrous in age. Inflorescence lax or dense. 



