SHADE TREES AND CATCH CROPS. 61 



Habilla. (See Hura crepitans.) 



Halasu (Coorg, India). (See Artocarpus integrifolia.) 



Hevea brasiliensis. Para rubber. 



The planting of the Para and other rubber as shade, for cacao and coffee naturally 

 suggested itself to many while the belief held that mere shade was a desideratum in 

 these cultures. It is barely possible that cacao or coffee might be grown as a sort of 

 catch cropibetween rubber trees, but if the permanent use of the land for the latter 

 purpose has been decided upon, it will probably be found to be much better policy 

 to plant the rubber thick enough to soon shade all the ground, insure permanent 

 moisture, and prevent the growth of other vegetation requiring expense for its 

 removal. In other words, it is possible that neither the rubber nor the other crops 

 would be as productive as soon or as extensively as if planted alone, and any such 

 combinations as the present would need to be justified by special and local reasons. 



The planting of Para rubber trees with coffee and other crops was attempted some 

 years ago in British India, but without conspicuous success from the financial stand- 

 point. The coffee districts are too dry and too elevated for the Hevea to become 

 productive, although it may appear to thrive and maintain its vegetative vigor. The 

 former plantings of Hevea in India have yielded returns only from the sale of seed, 

 though better results are now expected from forest plantings in low, overflowed 

 regions. Other species of Hevea may be found better adapted to high-land culture, 

 but the present indications are that closer planting to secure true forest conditions 

 will be desirable in this genus, as in Castilloa. 



Heynea sumatrana. 



Family Meliaceae. A tree mentioned by Raoul as used for coffee shade and refor- 

 estation in the Malay region. 



Hibiscus tiliaceus. (See Paritium tiliaceum.) 



Higuerilla (Mexico). (See Picinus communis.) 



Hog-plum. (See Spondias lutea.) 



Honne (Coorg, India). (See Pterocarpus marswpium.) 



Howlige (Coorg, India). (See Acrocarpus fraxinifolius.) 



Huamuchil (Mexico). (See^Pithecolohium dulce.) 



Huizache (Mexico). (See Acacia albicans.) 



Hule (Mexico). (See Castilloa elastica.) 



Hura crepitans. Sand-box tree. 



Common names. — Acupa (Colombia); Avilla (Porto Rico); Habilla; Javilla 

 (Panama); Monkey's dinner bell; Sand-box tree. 

 A peculiar American tree considered by botanists to belong to the Euphorbiaceae or 

 spurge family, but very different from the other members of that group. The com- 

 mon name alludes to the biscuit-shaped fruit which explodes when dry with a loud 

 report. It grows with great rapidity, and has an open, spreading habit, features 

 which have probably suggested its use as cacao shade in Trinidad, where, according 

 to Morris, it has on some of the best estates supplanted the madre de cacao (Ery- 

 thrina). The shade of the latter is too dense and the wood is so brittle that the 

 limbs are frequently blown down, to the injury of the cacao. It is easy to under- 

 stand that Hura may be superior in these respects, but that it will compare in desir- 

 ability with the better class of leguminous shade trees is scarcely to be believed 



