320 PENTANDRIA MONOCYNIA. Psilobhim. 



so much produced on one side as to seem bilabiate. Corolla with a 

 shoit tube, segments tive, acute, thick. JEuivuthn valvar. Stamina 

 five, inserted on the tube; anthers large. Ovary crowned with a 

 piomineut nectarial ring, two-celJed, po'ysporous ; vvufa arranged 

 round central, semi-cylindrical placentae. Style bifid. Stigmata, 

 two, thick and linear. — W. Jack. 1. cit» 



Obs. by N. W. 



This little shrub, rather sparingly I have found at Singapore, nearly 

 out of flower in the month of October, radicanton the root of ti^es. 

 It has the appearance of a Cephaelis ; the branches are two-winded ; 

 the headround, as large almost as a walnut, of a pink colour.— N. W. 



PS1LOBWM, W. Jack, in Mai Misc. ii, 



Calyx spreading, five-parted. Tube of the corolla short; limh 

 five-parted. Stamina inserted in the base of the corolla. Stigma 

 clavate, ten-winged, ex^erted. J<ruit cylindiic, silquaeform, cf.oAiyn* 

 ed with the persistent calyx, bilocular, many-seeded. Seeds insert- 

 ed on the axis in a double series. 



Nat. fam. Rubiace<z of Juss. 



Shrubby. i y eduncie§ asillary 3 few-flowered. JBlstivation valvate. 



1. P. nutans, IV. Jack. 



[pound in the interior of Sumatra, 



Stem erect, foiir-sided, with rounded angles. Leaves opposite, 

 petiolate, lanceolate, attenuated at both ends, acute, entire, smooth. 

 Stipules interpetiplar, broad, acuminate, carinate. Peduncles axil- 

 lary, drooping, bearing from three to six flowers. B> actes forming a 

 kind of involucre at the base of the very short pedicels. Calyx su- 

 perior, very large, composed of five leaflets or very deep segments, 

 which are veined with red. Stamina five ; Jilamenls. short, anthers 



