3GG Dr, Arnott on the Genus Rhizophora. 



§ 1. Petala apice nuclei. 

 Of this section I have not seen any specimens, and have 

 therefore taken the specific characters from Blume. 



1. B. gymnorrlriza (Blume), "foliis ovalibus acutis, petalorum laciniis 

 apice nudis, fructibus" (sen tigellis) "cylindracco-acutiusculis costatis." 

 Blume en. PL Jav. i. p. 92 (non Lam., nisi quod ad fructum a Gaertnero 

 mutuatum). — Rhizophora gymnorrhiza, Lin. sp. p. G31 (ex parte). 

 Gtertn.fr. t. 15. — Mangium celsum, Humph. Amb. \\\.p. 102. t.GS. 



Hob. in Java atque Moluccis. 



It is impossible to determine what species Linnaeus had most 

 in view, as he quotes both the figures of Rumphius and 

 Rheede's H. Mai. vi. t. 31 and 32. From, however, its ha- 

 ving been ascertained that he possessed a copy of Rumphius 

 and not of the other, but derived his information respecting 

 the latter from Ray's Historia Plantarum ; and as Rurnph's 

 description of the naked roots, as well as Rheede's, may have 

 given rise to the specific name, I gladly follow Blume in con- 

 sidering the present as the type of the Linnaean plant. Seve- 

 ral, if not all the species of the genus, but particularly B. 

 Rheedei, exhibit a similar structure in the lower part of the 

 stem ; so that upon the whole it would be preferable to adopt 

 the name of B. celsa, especially as Lamarck, who first described 

 the genus Bruguieria, and gave the name B. gymnorrhiza, did 

 so from the Malabar plant. Lamarck, however, confounded as 

 varieties several distinct species. 



Unfortunately Blume's descriptions of this and the follow- 

 ing are not sufficiently explicit to enable me to compare the 

 species with those I have myself examined ; but Rumph de- 

 scribes or figures in the present one ten calyx segments erect 

 in fruit, ten petals glabrous on the margin, and one-flowered 

 peduncles. Gaertner says that there are 12 — 14 incurved calyx 

 segments ; Blume, however, does not refer to Gaertner. . 



2. B. cylindrica (Blume), " foliis oblongis acuminatis, petalorum laciniis 

 apice nudis, fructibus" (seu tigellis) " cylindraceis obtusis leevibus." 

 Blume, l.c.p.9\ (excl. syn. Rheede). — Rhizophora cylindrica, Lin. 

 sp. p. 635 (ex parte). — Mangium digilatum, Humph. Amb. iii. tab. 70. 



Hub. in Moluccis et Java, &c. 



If it were difficult to fix the Linnaean synonyms of the last, 

 it is more so of this ; for while on the one hand Linnaeus only 

 saw Rumph's figure, on the other, in the f Species Plantarum,' 



