472 LXix. RUBiACE/E. [Pentanisico 



long, oblong-lanceolate, rather obtuse, deep violet-blue; throat 

 glabrous ; stamens 5, exserted ; filaments filiform, inserted at 

 the throat ; anthers linear-oblong ; disk small, fleshy ; ovary 

 2-celled ; ovules solitary in each cell, attached near the apex, 

 pendulous ; style exserted, bifid, filiform, violet-coloured ; fruit 

 ovoid, dicoccous, about y^- in. long ; seed solitary in each cell, 

 pendulous from near the apex some way down, soon free, minutely 

 punctulate. 



HuiLLA. — In sparingly-herbaceous places, somewhat shady, in 

 company with Elephant opus, in forests composed of species of Protea 

 and Myrtacese, at the river Monino, along the road to Quilengues, 

 abundant ; fl. and sparing fr. Feb. 1860. No. 5314. 



29. CANTHIUM Lam. Encycl. Meth. i. p. 602 (1783). 



Plectronia DC. ; Benth. & Hook. f. Gen. PI. ii. p. 110 ; non L. 



Plectronia L, is essentially a difierent genus; the character 

 originally drawn up and published by Linnaeus positively negatives 

 an agreement with Canthium, and the specimen in his herbarium 

 subscribed by his own hand with the name Plectronia ventosa is 

 an Olinia. It is true that he associated with his plant a plate of 

 a shrub in fruit figui-ed by Burman and now considered as a 

 Canthium, but Linnseus had not seen the specimen, and gives 

 the fruit-characters solely on the authority of Burman ; these 

 characters, however, are quite immatei-ial for the purpose of the 

 discrimination of the genus. Furthermore, Linnseus in describing 

 his only species had regard exclusively to his own specimen, and 

 although he quotes Burman's plate, he entirely neglects it for the 

 purpose of his definition. 



1. C. rhamnoides Hiern, sp. n. 



A bush, 8 ft. high, with the habit of a Rhamnus ; branches 

 spiny, sub-sarmentose, divaricate, pallid, glabrate, sub-terete : 

 branchlets pubescent, somewhat compressed towards the extremi- 

 ties ; spines \ to | in. long ; leaves opposite, elliptical or some- 

 what obovate, acuminate at the apex, unequally narrowed or 

 obtuse at the base, papery-membranous, green and scattered with 

 depressed hairs above, paler-green and pubescent with hairs 

 scattered and more closely arranged along the nerves and veins 

 beneath, 2| to 4 in. long by 1 to 2 in. broad ; lateral veins 6 or 7 

 on each side of the midrib, starting at about 35° with it, slender ; 

 petiole ^ to ^ in. long, pubescent ; stipules subulate-caudate from 

 a broad base, pubescent, exceeding the petiole ; flowers greenish, 

 pentamerous, on pubescent pedicels of |^ to i in. long, several 

 together in axillary opposite subsessile globular cymes of | to 

 1 1 in. in diameter ; calyx pubescent outside, the tube turbinate, 

 small ; the limb quinquepartite, the segments linear, ^ to J^- in. 

 long, glabrous inside ; disk fleshy, cushion-shaped, glabrate or 

 obsoletely puberulous ; ovary 2-celled, fleshy ; ovules solitary, 

 pendulous ; young fruit subglabrate, obovoid or oblique, nearly 

 ^ in. long. 



