Aerides Lour., Fl. Cochinch. 2: 525, 1790. 
Type: Aerides odorata Lour. 
Characterized by the presence of a distinct column- 
foot on which the lateral sepals are decurrent; rostellum 
well-developed, porrect. Pollinia 2, unequally cleft on a 
single, rather slender stipe. The 3-lobed lip is continuous 
with the column-foot with a porrect or arrect spur which 
is variously ornamented inside. 
The whole section Phalaenidium Pfitz. to which also 
Thrixspermum Sillemianum belongs, as suggested by 
Pfitzer, needs further study. The rather distantly placed 
terete leaves on a slender stem, the abbreviated, 1- to 
3-flowered racemes with conspicuously large flowers 
make a very distinct appearance. Pending further in- 
vestigation, it is probable that this whole section will 
ultimately be united with the genus Papilionanthe which 
Schlechter justly removed from Vanda. 
Aerides mitrata is the type of a genus of its own, 
Serdenfadenia Garay. 
Micropera viridiflora is related to Aerides japonica 
Rchb.f. and has nothing in common with the genus 
Gastrochilus to which it has been referred lately. 
Aerides flabellata must be rigidly compared with 
Vanda parviflora Lindl. and Vanda testacea (Lind].) 
Rchb.f. for its correct generic position. 
Aerides Dalzelliana (Santap.) Garay, comb. nov. 
Basionym: Micropera viridiflora Dalzell in Hook. Journ. Bot. 3: 
282, 1841, not Aerides viridiflora Thw. 
Syn. : Saccolabium viridiflorum (Dalzell) Lind], in Journ. Linn. Soe. 
3: 36, 1858. 
Gastrochilus viridiflorus (Dalzell) O.Ktze., Rev. Gen. Pl. 2: 
661, 1891. 
Sarcochilus Dalzellianus Santap. in Kew Bull. 3: 498, 1949. 
Gastrochilus Dalsellianus (Santap.) Santap. & Kapadia in 
Journ. Bombay Nat. Hist. 59: 842, 1962. 
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