33° 



ZONES AND REGIONS 



[Pt. Ill, Sect. I 



In other cases both active and dormant buds have envelopes. The 

 envelope is almost always soft and juicy, and is formed either of stipules or 

 of the petioles of the nearest older leaves. 



I have observed small hairy, but otherwise uncovered buds, in the 

 botanic garden at Buitenzorg, on the following woody plants : Calophyllum 

 tomentosum, Viburnum sundaicum, Rottlera tinctoria, Chrysophyllum 

 Cainito, Sideroxylon firmum, Ardisia fuliginosa, Diospyros subtruncata, 

 Mabe Ebenus, Pterospermum Heyneanum, species of Sterculia, Schima 

 Noronhae, Thea cochinchinensis, Flacourtia Ramontchi, Capparis Hey- 

 neana, Nothopegia Colebrookiana, BL, Cinnamomum sericeum, Ryparia 



K**. 



Fig. 171. Tillandsia striata, var. Schlumbergeri. A markedly xerophilous light-demanding 

 epiphyte of South Brazil. Half the natural size. 



caesia, Cluytia oblongifolia, Coelodepas bantamensis, Tetranthera chrys- 

 antha, Tectona Hamiltoniana (Fig. 172, 2). Many of these plants in the 

 mature condition have glabrous leaves. Uncovered buds with a coating 

 of varnish are much less common. I found them in the Buitenzorg garden, 

 in Tabernaemontana pentasticta and Achras Sapota. I also noticed pro- 

 tection by stipules in Artocarpaceae, Urticaceae, Piperaceae, and Rubiaceae, 

 also in Wormia ochreata (Fig. 172, 4), species of Tabernaemontana, and 

 Phyllanthus zeylanicus. Treub and Potter have described several similar 

 cases ; the latter has also furnished figures. According to Potter, removal 

 of the protective slender trumpet-shaped stipules, in Artocarpus incisa, 

 occasions the arrest of the enclosed leaves. In Canarium zeylanicum, Bl., 



