NATURAL AREAS AND REGIONS 



655 



covering every inch of dry land, cannot 

 be appraised too highly, no matter 

 what form of organic life we chose for 

 intensive study. 



The following list gives a few of the 

 larger trees from CO to 150 ft. in height 

 that are found within the research area. 

 Rarely, some of these trees become 200 

 ft. in height. Unfortunately a great 

 many of the largest trees have remained 

 unidentified and unidentifiable. 



Dimorphandra excelsea (Schomb.) Baill., 



Mora 

 Nectandra rodiei Schomb., Greenheart 



Carapa guianensis Aubl., Crabwood, 

 Guiana Mahogany 



Pentaclethra macroloba (Willd.) Kuntze, 

 Trysil 



Aspidospernium excelsum Benth., Pad- 

 dlewood, Yaruru 



Rhizophora 7nangle Linne, Llangrove 



Spachea elegans A, Juss., Pigeon-berry 



Inga sp., Waikey 



Hevea sp., Hatteeballi 



Sapium jenmani Hemsl., Wild Rubber 



Vochsia tctraphylla DC, Etaballi 



Cassia multijuga Rich., Guana 



Anacardium rhinocarpus DC., Wild 

 Cashew 



Spondias lutea Linne, Wild Plum, Hog 

 Plum, Hoobooballi 



Copaifera pubiflora Benth., Purleheart 



Piratinera guianensis Aubl., Letter- 

 wood 



Hymeneae combaril Linne, Locust, Siniri 



Hieronyma laziflora Muell. Arg., Sura- 

 danni 



Simarupa amara or officinalis, Match- 

 wood Tree, Simarupa 



Unidentified, Dalina 



Cecropia palniata, Cecropia, Congo- 

 pump, Pumpw^ood, Wanasuru 



Unidentified, Kurahara 



Unidentified, Meerah-wood, Antwood 



Unidentified, Hooroowassa 



Myristica surinaniensis Roland, Dalli 



Unidentified, Wareemeah 



Nectandra sp., Silverballi 



Unidentified, Potchuwee 



Tapirira guianensis Aubl. 



Unidentified, Arracanduck 



Psidium guava, Cockreeeou, Wild Guava 



Humirium floribundam Mart., Tau- 

 roneero 



Tenipa americana Linne, Makreekoonee 

 Rain-forest palms 



Asirocaryum tucuma Mart., Cuyuru 

 Palm, Acqueero 



Maximilliana regia Mart., Kokerite 

 Palm 



Cocos nucifera Linne, Cocoanut Palm 



Mauritia fiexuosa L. f., Eta Palm 



Euterpe edulis Mart., Manicole Palm 



Cleared areas. Immediately about 

 the Kartabo laboratory are 25 clumps 

 of bamboos covering a compound of 

 three acres. These are a very tall 

 Javan species, imported by the Dutch 

 from 250 to 300 years ago. West of the 

 laboratory is a clearing of 7 acres which 

 four years ago was in course grass. At 

 the present time it can still be called a 

 clearing, but tall saplings are springing 

 up in all directions and the jungle is 

 creeping in on all sides. This change 

 is a most interesting one and the altera- 

 tion from jungle offers opportunity for 

 hosts of strange organism.s, floral and 

 faunal. 



In the clearing every patch of open 

 ground is carpeted with a dense growth 

 of the cheerful little pink Mazaruni 

 primroses, Sipanea pratensis Aubl. — by 

 far the -dominant color of the open 

 clearing and with many tiny weevils 

 and other insect hosts. With them are 

 numerous other small, flowering plants, 

 such as Spermacocs verticillata Linne 

 and caerulescens Aubl., and such curious 

 little growths as the Christmas-tree 

 plants, Dupatya. In other parts of the 

 clearing Vervain, Stachytarpheta cayen- 

 nensis Vahl. and Velvet-Leaf, Sida 

 cordifolia Linne are common, while 

 scattered here and there are patches of 

 Orinoco Boneset Mikania orinocensis 

 H. B. K. Sprouting plants of cashew 

 are common, Anacardium occidentale. 



In unexpected places great clumps of 

 ginger lilies, Cruium, spring up. The 

 Pinwheel flower, Tabernaemontana un- 

 dulata Vahl. shows one of the most 

 amazing floral-fruit transformations. 

 The Tree of Life Bryophyllum pinnatum 

 (Lam.) Kury is as much at home here 

 as in other parts of the world. Sensitive 

 plants Mimosa polydactyla H. & B., 

 wilt at a touch, and stray bushes of 

 Indigo, Indigofera sp. have handed down 

 their seeds for three hundred years 

 since the Dutch settlers brought them 

 there. 



A still larger growth may be defined 

 as saplings, of which the Duka, Tapirira 

 guianensis Aubl., is the most rapid 

 grower. With these, young jungle trees. 



