422 ANGIOSPERMAE—MONOCOTYLEDONES 



Darwin describes more or less minutely species of the following genera of other 

 foreign orchids : — 



(a) Epidendrae : Cattleya LhidL, Epidendrum L., Coelogyne LindL, Sophronilis 

 Lindl, Barkeria Knowles et Wesk., Laelia LindL, Leptotes LindL, Phaius Lour., 

 Evelyna Poepp. et EndL, Bletia Ruiz ei Pav. 



(b) Malaxideae : Pleurothallis R. Br., Stelis Sw., Masdevallia Ruiz et Pav., 

 Microstylis Nutt., Bulbophyllum Thou., Caleana R. Br., Dendrobium Sw. 



(c) Vandeae : JMaxillaria Ruiz et Pav., Aerides Lour., Oncidium, Sw., Rodri- 

 guezia Ruiz et Pav., Phalaenopsis Blume, Calanthe R. Br., Acropera LindL, 

 Catasetum Rich, (with Myanthus LindL and Monachanthus LindL), Mormodes LindL, 

 Cycnoches LindL, Sarcanthus LindL, Galeandra LindL, Vanda Jones, Cymbidium 

 Sw., Trichopilia LindL, Odontoglossum H. B. et K., Brassia R. Br., Miltonia 

 LJndL, Stanhopea Frost (S. devoniensis LindL is described in an appendix by the 

 German translator G. H. Bronn), Warrea LindL, Zygopetalum Hook., Lycaste 

 Lindl. 



(d) Ophrydeae : Bonatea Wi//d. 



CVIll. ORDER SCLTAMLNEAE R. BR. 



(Including Zingiberaceae LindL, Marantaceae LindL, Cannaceae Link, and 

 Musaceae LindL) 



845. Roscoea Sm. 



2661. R. purpurea Sm. (Lynch, J. Linn. Soc, Bot., London, xix, 1892.) — 

 Lynch says that the flower mechanism of this species resembles that of Salvia. 



846. Hedychium Koen., and 847. Alpinia L. 



Literature. — Delpino, ' Sugli appar. d. fecondaz. nelle piante autocarp.,' 

 p. 22, 'Altri appar. dicog. recent, oss.,' p. 57; Hildebrand, Bot. Ztg., Leipzig, 

 XXV, 1867, p. 277. 



In species of these genera lepidopterous visitors touch first the stigma and then 

 the anthers, thus effecting crossing. 



848- Zingiber Adans. 



2662. Z. officinale Rose. (Hildebrand, ' Geschlechts-Vert. b. d. Pfl.,' p. 69.) — 

 Hildebrand states that when insects visit the flowers of this species, cross-pollination 

 is ensured by the projecting position of the stigma. 



849. Maranta Plum. 



The style is held firmly by a hood-shaped perianth leaf on the lower side of the 

 almost horizontal flower, and pollen is deposited on the capitate stigma while still 

 in the bud. When visited by an insect, the style springs out of the hood and bends 

 in such a way that the pollen brought by the insect reaches the stigmatic papillae, 

 and the insect dusts the under-side of its body with fresh pollen. 



