Dr. Arnott on the Genus Rhizophora. 373 



longo-ovalia, breviter acuminata, subintegerrima supra medium denticu- 

 lis paucis obsoletis, 4 — 5 poll, longa, 2 — 2 £- lata, bast inpetiolum vix se- 

 mipollicarem subattenuata. Flores axillares, fasckulati, pedicellati, pe- 

 dicellis peliolo brevioribus, medio articulatis. 



I. D. coriaceum, Arn. — Microtropis coriacea, Wall A 



Hob. In Pulo- Penan?. 



I have seen no stipules, but there are scars between the pe- 

 tioles as in Rhizophorea after the stipules have fallen off. The 

 ovarium and stigma seem to be always in a quinary propor- 

 tion, even when the flowers are tetramerous ; but then two of 

 the divisions of the stigma are more approximated than the 

 others, and one of the cells of the ovary appears to be imper- 

 fect. 



Martius in his observations on Indian plants in the 'Alge- 

 meineZeitung 5 for January 1834, and f Ann. des Sc.Nat/ n. s. i. 

 p. 250, mentions that there are eleven species of Rhizophorea in 

 East India according to W allien* s list : there are however only 

 eight noticed by Dr. Waliich, but this number may be made 

 up of the three species of Carallia described in De Candolle's 

 Prodromus, of Rhizophora conjugata, gymnorrhiza and cylin- 

 drica of Linnaeus; R.caryophylloides, Jack; R. Candel and Can- 

 delaria of De Candolle, with R. parviflora and decandra of 

 Roxburgh mentioned in Walliclr's list. While one of these 

 has been unnecessarily split down, others, very distinct, ap- 

 pear to be confused under the same names, and Blume's are 

 altogether omitted. I have now enumerated fifteen species of 

 Rhizophore<e verce, from which we must deduct one from 

 America and another from New Holland not found in East 

 India. Of the remaining thirteen, one from Cochin China is 

 scarcely known ; a second extends throughout the Indian 

 ocean, from the Mauritius to the Moluccas or perhaps Timoij 

 and as far north as Arabia Felix and Bengal ; a third is found 

 in Malabar, Timor, and New Holland ; three appear to be 

 confined to the Eastern Islands ; two to Malabar ; one is 

 common to Malabar and the mouth of the Ganges ; two found 

 at the mouth of the Ganges occur probably also further east and 

 in Penang ; and the remaining two seem to have been observed 

 (unless different species are alluded to by different authors) in 

 Ceylon, Malabar, Bengal, Java and Amboina. To these thirteen 

 have to be added Roxburgh's two species of Carallia with ser- 



