BY i:. S. ROGERS AND C. T. WHITE 121 



rostellar or pollinar : it occurs only in some species and 

 in these under very various forms, so that it cannot he 

 . rehedon as a generic character. It is further so difficult 

 of analysis in dried specimens, that much allowance must 

 be made for my description of it." 



The appendage referred to is figured in his Icones 

 Plantarum XXII., pi. 2173, figs. 4 and 5 ; also pi. 2174, 

 fig. 5. This appendage is not present in the Australian 

 Z. oblonga, but in this species there is a definite 

 inflexion of the margins of the caudicle (as in pi. 2174), 

 although the actual attachment of the pollinia to the lower 

 end of the caudicle appears to be normal. 



Such inflexion of the margins of the caudicle together 

 with an abnormal attachment of the pollinia (as figured 

 by him), Hooker regards as an earh^ stage in the evolution 

 ef his '■ appendage." 



Zeuxine oblonga, sp. nov. 



(Text-fig. 2). 

 Planta circiter 30 cm. alta. C'aulis ascendens, gracilis. Folia 6 

 vel 7 alternata, elliptica vel oblonga-elliptica, 2. .5-7. 5 cm. longa ; petioli 

 basibus vagini-formes dilatati. Bracteae 2, vel .3, sub-liirsutae, 

 acuminatae. membranaceae, basibus vagini-formes dilatatae. Flores 

 parvi. .sessiles, extus hirsuti : s])ica 4-7.5 cm. longa, mediocriter dense 

 florifera. Sepalum dorsale cum j^etalis in galeam cohserente, circiter 3 mm- 

 longuiu. Sepala lateralia libera, patentia, late lanceolata. 3-3. .5 mm. 

 longa, 1 -nervosa. Labellum circiter 3 mm. longum inferum (interduni 

 superuin ?) sessile; basi columnae adnatum brevissime ; basi cvmbiforme, 

 in medio contractum deinde in apicem terniinalem bilol)atum abrupte 

 dilatatum, alae oblongae divaricatae : intus bicallosum. C'olumna 

 .brevissima, antica (parte) bicarinata : anthera rostrata rostello 

 aequans. Rostelluni profunde bipartitum, erectum. Pollinia 2, ope 

 caudiculae linearis glandulae longae lineari-ellipticae affixa. Stigmata 2, 

 magna, lateralia. 



Plants about 30 cm. in height, slender, with hairy 

 stems on a creeping rhizome. Leaves six or seven, ; Iter- 

 nate on the lower half or third of the stem, the Ijase of the 

 petiole dilated into a loose membranous tubular sheath ; 

 elliptic to oblong-elliptic, 2.5-7.5 cm. long, ^^dth a tendency 



Text fig. 2. — Plants natural size. 



a. anther; col., column: ;/. galea formed by the union of the 

 dorsal sepal and the petals ; gl., gland : lab., labellum ; l..^., lateral 

 sepals ; ov., ovary ; r, rostellum ; s., stigma ; all enlarged. 



