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 : Calophyllun:!' 

 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, BI., Cinnamomum scriceum, Ryparia 



t 



I J 



Fig. 171. Tillandsia stricta, var. Schlumbergeii. A markedly xerophilous light-demanding 

 epiphyte of .South Brazil. Half the natural size. 



caesia, Cluytia oblongifolia, Coelodepas bantamensis, Tetranthera chrysi 

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

 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 proi 

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

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

 Phyllanthus zeylanicus. Treub and Potter have described several simila' 

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

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

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



