NEW AND LITTLE-KNOWN MADAGASCAR PLANTS. 3 



VIOLARLE. 



IONIDIUM BUXIFOLIUAT, Lam. 



Open sandy meadows, Fort Dauphin, 2377 ! 



Alsodeia pauciflora, Tul. In woods, Fort Dauphin, 2506! 

 Previously only found by Commerson. 



BIXINE.E. 



Aphloia deltoidea, Baill. Previously found only by Com- 

 merson. Fort Dauphin, 2512 ! 



PORTULACACE^. 



* 



Tisonia Batllont, sp. n. 



Arborea, foliis oblongo-lanceolatis obtuse acuminatis breviter 

 petiolatis glaberrimis, venis venulisque prominentibus, rnargioe 

 flavo incrassato subrevoluto, pedunculis brevibus, bracteis ovatis 

 ciliatis, pedicellis numerosis prope basin articulatis, sepalis 

 cordato - orbicularibus reduplieato-valvatis glabris, corolla 0, 

 antheris oblongis, stylis 3 liberis. 



A tree with glabrous striate branches. Leaves (excluding 

 petiole) 9-13 cm. long and 4-5 cm. broad; petiole about 1 cm.; 

 veins prominent on both surfaces, densely reticulate (about five 

 pairs of lateral veins). Peduncles about 1 cm. ; bracts about 

 5 mm., broad at base, with a tuft of hairs in the axils ; pedicels 

 below articulation 3 mm. long, above 7-8 mm. Sepals 3, about 

 1 cm. broad and the same in length. Ovary ovoid. 



Woods near Fort Dauphin, 2590 ! 



Distinguished from T. glabrata, Baill., in Bull. Linn. Soc. Par. 

 i. 572, by the sepals and inflorescence. 



Tisonia coriacea, sp. n. 



Arbor, ramis griseis corrugatis hirsutis, foliis variis ellipticis 

 vel oblongis etiam obovatis cuspidatis vel obtusis denticulato- 

 serratis coriaceis subglabris margine revoluto, racemis folia 

 sequantibus vel brevioribus multifloris omnino pilosis, bracteis 

 ellipticis parvis, bracteolis minutis acuminatis, pedicellis prope 

 basin articulatis, sepalis cordato-orbicularibus pubescentibas. 



A forest tree ; branches covered with elongated lenticels. 

 Leaves quite glabrous and shining above, but with a few scattered 



b2 



