NEW AND LITTLE-KNOWN MADAGASCAR PLANTS. 17 



MELASTOMACE.E. 

 (By Prof. A. Cogniattx.) 



OSBECKIA DIONYCHOIDES, Cofftl., Sp. n. 



O. ramis foliisque supra brevissime denseque setulosis, foliis 

 petiolatis ovato-oblongis acutiusculis basi rotundatis subtus bre- 

 vissime denseque velutinis, 7-nerviis, nervis 2 intermediis basi 

 distiucte coalitis ; paniculis paucifloris ; floribus 4-meris, longius- 

 cule pedicellatis, ealyce subhemisphasrico, ut videtur subtruncato 

 adpresse longiuscule denseque setuloso, antheris oblongis, fructu 



exserto. 



Rami robusti, obscure tetragoni. Petiolus robustiusculus, 



breviter denseque setulosus, 1-1*5 cm. longus. Folia rigida, 5-6 

 em. longa, 2*5-3 cm. lata. Paniculae 3 cm. longae ; pedicelli 

 robusti dense adpresseque setulosi, 5-8 mm. longi. Calyx 5 mm. 

 longus. Petala purpurea, late obovata, subretusa, brevissime 

 ciliata, 1 cm. longa. Antherse inappendiculatse, 3 mm. longa*. 

 Stylus gracilis, 1 cm. longus. Capsula globosa 4-costata, superne 

 longiuscule denseque villosa, 8 mm. crassa. Semina f mm. longa. 



(E 



! 



Osbeckia Elliotii, Cogn., sp. n. (Plate IV.) 



O. ramis junioribus ad nodos brevissime ciliatis caeteris glaber- 

 rimis, foliis petiolatis oblongis breviter acuminatis basi acutius- 

 culis vel subrotundatis trinerviis vel obscure 5-nerviis, supra 

 tenuissime denseque albo-punctatis subtus ad nervos vix setulosis 

 ceteris glabris, paniculis paucifloris, floribus 4-meris breviter 

 pedicellatis, ealyce paucisetuloso praecipue ad lobos, tubo sub- 

 ovoideo-campanulato, lobis anguste triangularibus obtusis, tubo 

 paullo longioribus, antheris oblongo-linearibus obtusis. 



Rami satis graciles, obscure tetragoni. Petiolus gracilis glaber, 

 1-1 '5 cm. longus. Eolia rigid iuscula supra intense viridia subtus 

 pallida, 5-7 cm. longa, 1*5-2 cm, lata. Paniculae foliosae 5-7 cm. 

 longae; pedicelli glabri, 3-8 mm. longi. Calycis tubus pallide 

 viridis, 5 mm. longus; lobi distiucte articulati, 6-7 mm. longi. 

 Petala rosea, obovata, truncata vel subretusa, breviter ciliata, 

 15-17 mm. longa. Antherae aurantiacse, 5-G mm. longa?, loculis 

 leviter undulatis. Stylus filiformis, 1*5 cm. longus. Capsula 

 subglobosa, apice breviter setulosa oaeteris glabra. 5-6 mm. 

 crassa. 



Near Fort Dauphin in woods, 2488 ! Vaingaindrano, 2251 ! 



DlCIKETANTHERA GRANDIf OLIA, Cogn., Sp. n. 



Ramis obtuse tetragonis, ad nodes anuulato-setosis ceteris 



LINN. JOURN. — BOTANY, VOL. XXIX. C 



