196 Lxx. RUBiACE^ (hiern). [FsycJhotrla. 



Leaves chartaceous. 



Stipules ^-| in. long ; bracts large. 



Lateral veins of the leaves about 20 pairs . 47. P. latistipula. 

 Lateral veins of the leaves about 13 pairs . 48. P. SchweinfurthiL 

 Stipules \-\ in. long; bracts small. 

 Stipules bifid. Stomata inconspicuous. 



Leaves 6-8 in 49. P. hfcens. 



Leaves l|^-5 in 50. P. reptans. 



Stipules entire or bidentate; leaves scat- 

 tered with black dots 51 P. mncronata. 



Stipules undivided. Stomata conspicuous . 52. P. stietophylla. 

 Calyx-limb shorter than the ovary. 



Leaves paler beneath . 53. P. ohscura. 



Leayes of nearly the same colour on the two 

 surfaces. 

 Style glabrous. Stipules obovate-rotund . . 64. P. crispa. 

 Style puberulous. Stipules ovate-lanceolate . 55. P. trachystyla. 

 . Heads solitary, rather dense 56. P. Soyauxii. 



V. Chasalia. 



Flowers crowded in subsessile heads 57. P. virens. 



Flowers in lax or dense but not capitate pedunculate 

 cymes. 

 Corolla glabrous outside. Leaves glabrous. 



Leaves much acimiinate 58. P. Ansellii. 



Leaves shortly or scarcely acuminate. 



Flowers ^-§ in. long. Calyx 5-cleft 59. P. zanguehaHca. 



Flowers nearly 1 in. long. Calyx subtruncate . 60. P. umbraticola. 

 Corolla pubescent outside. Leaves pubescent beneath. 61. P. nubica. 



1. P. pauridlantha, Hiern. Glabrous. Branches terete, dark., 

 compressed towards the extremities. Leaves elHptical, acuminate, 

 wedge-shaped at the base, chartaceous, of nearly the same colour on 

 both surfaces, spreading, 3-5 by f-1^ in., margins narrowly revolute ; 

 lateral veins about 7 pairs, slender ; petiole tV~6 ^^- ^^^? > stipules 

 ovate or lanceolate, bifid, ^— ^ in. long, teeth filiform-subulate ; some- 

 times an additional small tooth occurs on each side near the base of 

 the stipule. Flowers 4-5-merous, about J in. long, on rather shorter 

 slender pedicels, forming small pedunculate ebracteate terminal few- 

 flowered cymes ; common peduncle slender, § in. long. Calyx-limb 

 small, shortly toothed. Corolla 4-5-fid ; throat thinly bearded. An- 

 thers exserted. Style bifid, included. 



Tipper Guinea. Sierra del Crystal, Mann ! 



2. P. brachyantha, Hiern. A nearly glabrous shrub, about 6 feet 

 high. Branches terete, somewhat compressed towards the extremi- 

 ties. Leaves oval or oblong, subacuminate, wedge-shaped at the base, 

 thinly chartaceous, glabrous, 3-9 by 1^3^ in., margins repand-revo- 

 lute ; lateral veins about 11 pairs, slender, not -conspicuous ; petioles 

 ranging up to ^ in. ; stipules about J in. long from an ovate base, puberu- 

 lous at the back, tips setaceous. Flowers tetrameious, about ^ in. 

 long when expanded, on short slender pedicels, in terminal trichotomous 

 subcorymbose pedunculate panicles of about 1^ in. diam. ; bracts obso- 

 lete, bracteoles small, subulate ; common peduncle 1-3 in. long, slendei*. 



