— 249 — 



and bushes (see fig. 30). This manchineel forest reaches landwards 

 to the lower-lying lagoon-like stretches with Laguncularia forest 

 which is mentioned under the mangrove vegetation. 



In the sand vegetation of the north side of St. Croix is often 

 found Thespesia populnea Gav. and Terminalia Catappa L. imported 

 from Asia and common in the Barringtonia formation. They are 

 also common in St. Thomas, in any case Terminalia Catappa, 

 which at several places e. g. at the head of Magens Bay almost 

 forms a forest-like vegetation (see fig. 31). 



As I have not 

 mentioned the ana- 

 tomy of the leaf of 

 the following spe- 

 cies in my paper 

 and as Warming 

 in "Halofyt-Stu- 

 dier" also does not 

 mention the subject, 

 I may give here a 

 short description of 

 them. 



Dalhergia hecasto- 

 phyllum (L.) Taub. 



The leaf is dor- 

 siventral. The epi- 

 dermis of the upper- 

 side (fig. 32, b) con- 

 sists of rounded- 

 polygonal, low cells, with a rather thick cuticula; it lacks stomata. 



Beneath the epidermis we have a rather large-celled hypoderm 

 (fig. a), then follows the palisade-tissue, consisting of two — three layers 

 of cells, of which the uppermost are cylindrical, while the under- 

 most are short, barrel-shaped. The cells of the spongy-parenchyma 

 have in transverse section a rounded-subquadrate form, with rather 

 large intercellular openings. 



The epidermis of the underside (fig. c) bears numerous thick- 

 walled papilte, divided by a wall parallel with the surface into 

 two cells; occasionally also a vertical wall occurs. The stomata, pro- 



Botanisk Tidsskrift. 29. Bind. 17 



Fig. 32. Dalbergia hecastophyllum (L.) Taub. Anatomy 

 of the leaf, a, transverse section of leaf, b, epidermis of 

 the upper surface, c, epidermis of the underside, d, stoma. 



