. The classification of flowering plants. Plants. V] ORCHIDACEAE 373 The arrangement of Iknthani aiid Hooker in the Genera Plantarum closely resembles that of Lindley, but four tribes only are recognised, Malaxideae and Epidendreae being united as Epi- dendreae, while Arethuseae are merged into Xeotteae. Pfitzer^, who has elaborated the order in the Pjianzenfamilien^ criticises this as depending too much on the biological correlation of the flower to insect-visits for pollination, and too little on the general study of the plant, to be a natura He retains the Oph- rydeae which are char- acteri
. The classification of flowering plants. Plants. V] ORCHIDACEAE 373 The arrangement of Iknthani aiid Hooker in the Genera Plantarum closely resembles that of Lindley, but four tribes only are recognised, Malaxideae and Epidendreae being united as Epi- dendreae, while Arethuseae are merged into Xeotteae. Pfitzer^, who has elaborated the order in the Pjianzenfamilien^ criticises this as depending too much on the biological correlation of the flower to insect-visits for pollination, and too little on the general study of the plant, to be a natura He retains the Oph- rydeae which are char- acterised by the persist- ent basitonic anther, but subdivides the Acrotonae into twenty-eight tribes, based on the terminal or lateral character of the inflorescence, the vernation and develop- ment of the leaf, the development of the stem, and the form and rela- tive size of the lip. Of these Neottiinae repre- sents the Neotteae of the Genera Plantarum; tribes 3, 4, 5, 7, 8, 9, 15, and 16 the Epidendreae', and tribes 6, 10 to 14, and 17 to 20 the Vandeae of the same arrangement. Some of Phtzer's tribes cor- respond to subtribes in the older arrangement, but in many cases his generic groups are smaller than those recognised in any pre- vious attempt to systematise the order. In the following sketch only the more important tribes and genera are indicated, A. Basitonae. Caudicles developed at the base of the pollinia, anther not falling off. Tribe 3. Ophrydinae, about 45 genera, mainly north temperate, in- cluding the British genera Orchis, Aceras (Man-orchis), Ophrys, Herrainium and Hahenaria, the sections of which last genus, â Gymnadenia, Xeotima, Platanthera, and Coeloglossum, Pfitzer restores to generic rank, restricting Hahenaria proper to the large number of tropical species characterised by elongated stigmatic processes (fig. 173, D), A number of genera com- prising the subtribes Satyrieae {Satyrium, Disa) and Corycieae are chiefly South and Tropical African. B. Acrotonae, Po
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectplants, bookyear1904
