BY R. S. ROGERS AND C. T. WHITE 123 



dehiscence of the capsules has l)een completed. In these 

 specimens the flowers are reversed. It is thought that 

 this may be the result of torsion changes in the ovaries 

 due to age and weathering, and should not l^e regarded 

 as the normal condition. 



Z. attenuata, sj). nov. 



^ratctiac vitiosissiinae. 



J'lanta Lcracillima. 1.1-17..") cm. alta. Radix t ulcerosa ? Caulis 

 hirsiitus, iiracillimus. jMilia 2 vcl .'?. ])r()])e basin, ovata, 5-nervosa, 

 reticulata; lamina circiter l.;! cm. l()n;.ra, 1 cm. lata; petioli interclum 

 laminae ac(|iiante.s, l)asibus vairiniformes dilatati. Bracteae 3 vel 4, 

 acuminatae, circiter 4 mm. lonL'ae, memhranaceac, liasibus va.Lriniformes 

 dilatatac, 



Uniflos vel floi'es ])aiici ; iaxi-racemo.si, extus liii'.snti ; ])edicelli 

 breves graciles. .Se])aia lateraiia fere ovato-ianceolata, libera, circiter 

 5 mm. longa ; sepalum dorsale cum petalis in galeam cohaerente ; 

 galea circiter 4 mm. Innga. Ijabellum circiter (J mm. longum, pellucidum, 

 membranaceuni. basi columnae adnatum ; in ])arte infcro anguste 

 eyiiibifcirme, '.] nervosum, intus 4-callo.sum biscriatum ; ultra medium 

 contractum, ilcinde in apicem terminalem bilobatum dilatatum, alae 

 divaricatae cuneato-oblongae marginibus rcmoti.s laceratis. ('dlumna 

 brevissima, antica l)icarinata. l-?ostellum ])r(ifunde liipartituni, ereetum, 

 supra basin columnae circiter :} mm. al a. .Atitbera aiiguste elongata 

 ro.stello ae'|uans 



Plants Aery slender, apparently not exceeding 15-17.5 

 cm. in height. Root tuberous (?) with loose fibrous invest- 

 ment. Stems very slender, hairy. Leaves basal or very 

 near the base, two or three, ovate, five-nerved, reticulated 

 as in a dicotyledon : lamina about 1.5 cm. long and about 

 1 cm. wide ; petioles sometimes equalling the lamina in 

 length, dilated at their bases into loose transparent tubular 

 (often imbricated) sheaths. Stem-1)racts three or four, 

 acuminate, about 11 mm. long, membranous, converted 

 for some distance above their insertion into loose tubular 

 sheaths. Flowers single, or in a few-flowered loose 

 raceme : hairy on the outside, on short slender pedicels. 

 Lateral sepals almost ovate- lanceolate, free, about 5 mm. 

 long ; dorsal sepal connate with the lateral petals to form 

 a galea about 4 mm. long. Labellum about 6 mm. long, 

 thin, membranous, adnate to the base of the column : the 

 lower part narrowly cymbiform, 3- nerved, with four (or 

 three ?) linear calli on each side near the 1)ase ; contracted 

 beyond the middle into a wide bi-lobed apex, the lobes 

 divaricate, cuneate-oblong with lacerated otiter margins. 



