— 205 — 



A. Rumphiana Hallier. f. Med. Rijksherb. Leiden No. 37(1918) p. 89[!]; — 

 Sceura marina Forsk Flor. Aegypt.-Arab. (1775) Cent. I! p. 37 [!]; 

 Racka tor rida Bruce. Trav. Abyss, et Nub. V (1790) App. p. 44; J. F- 

 Gmel. Syst. (1791) p. 245 [!]; Roem. & Schult. Syst. Veg. IV (1819) p. 13 

 [I];- Racka ovata Roem. & Schult. Syst. Veg. iV(lSlQ) p. 207 [\];— Ma lode n- 

 dron du petit thouars. Gen. Nov. Madag. (1806) p. S No. 26; Lam. Enc. 

 Méth. Suppl. V (1817) p. 698 [!]; Roem. & Schult. Syst. Veg. IV (18 1 9) p. 

 34 et 519 sub. Avicenniae [!];-- fialodendron Thouarsi Roem. & SCHULT. 

 Syst. Veg. III (1819) p. 485 [!];-- Anacardium BAUHIN. Pinax Theatri Bot. 

 Ed. 1(1623) et. II (1671) p. 511. V. [!];-- Mangium album RUMPH. Herb. 

 Amb. Ill (1750) p. 116 torn. 76. (!). 



Statio; Praecipue per oram maritimam in lutoso argillaceo salso solo, 

 sub eo glarea, in propinque effluviorum et aesturiorum porro praeter sai- 

 son paludes et in silvis accessu maris expositis, aititudine maris 0--5 M. , 

 raro altiores .-- I n f I o r. et. F r u c t. : J a n. -- D e c. 



Distribution: East- Africa, Asia and Australia 



Remarks.: A. marina (FORSK.) VlERH. (s. 1.) is the most widely 

 spread species in the genus Avicennia. It is extremely rich in forms, es- 

 pecially in what concerns the shape of the leaves; this variability has been 

 the cause of a great number of names for this species. Although the flowers 

 are always small, they can, it is true, differ a little from each other in size. 

 The inflorescence is not less variable than the leaves; it can be composed 

 either of spikes with many flowers, moderately long, often interrupted, or 

 of small crowded heads. 



1. a. Plantae Africae orientalis et Arabiae . . .7. var. iypica Bakh. 



b. Plantae Asiae et Australiae 2 



2. a. Inflorescentia partialis elongata, subspicata, 0.5—2 c.M. longa, 10—30 flora. 



—Stylus brevissimus vel subnullus; fructus anguste spathulatus. . 



. . ß var. alba (Bl.) Bakh. 



b. Inflorescenlia partialis compacta, cephaloidea vel pyramidata, 0.5—1.2 c.M. 

 longa, 2— 12 flora. Flos expansus mediocris, 0.5 — 0.7 c. M. longus, 0.5-0.7 

 c.M. diam. ; corolla tubo 0.3 c.M. longo, laciniis 2.5-3 c.M. longis, 0.2— 

 0.25 c.M. latis; filamento 0.20-0.22 c.M. longo; anthera 0.10—0.12 c.M.. 

 pistillo tubo aequali vel vix longiore, conspicuo, stylo brevi, stigmate post 

 corollae lapsum exserto. — , . 3 



3. a. Folia elliptico-oblonga, apice acuminata, attenuata 



' . y var. resinifera (Forst.) Bakh. 



b. Folia rotundo-ovata, vel obovata, apice obtusa 4 



4. a. Folia rotundo-ovata, basi obtusa vel rotundata, petiolo 0.5—1.2 c.M. longo 



Ô var. intermedia (Griff.) Bakh. 



b. Folia obovata, basi attenuata, petiolo 1.5—3 c.M. longo 



; f var. Rumphiana (Hall. f. ) Bakh. 



var. a typica BAKH. — (Descript. ex libr. div.) 



Syn: Sceura marina FORSK. (1775); Racka tor rida BRUCE (1790); 

 Halodendron PET. THOU. (1806.); Racka ovata ROEM. & SCHULT. (1819) ; 

 fialodendron Thouarsi ROEM & SCHULT. (1819); Avicennia marina 

 (FORSK) VlERH. (1907). 



Frutex vel arbuscula forma Salicis, saepe arbor, ramosissimus, aititu- 

 dine 2--8 M , crassitudine 0.5 M., cortice albo vel olivaceo, laevi. Rami 

 juniores decussati, tenues quadrangulares, noclis incrassatis Folia ovata 



