aBiuris.] CXX. ORCHIDER. 395 
cells occupying nearly the whole inner surface. Rostellum 2-fid, 
shorter than the anther. Pollen-masses granular or mealy, wit out 
any distinct caudicle.—Terrestrial glabrous herbs, with underground 
tubers. Leaves narrow, few at or "ear the base of the stem , with a 
rs 
close over the column, make it appear as if the petals were outside in 
æstivation, and they are sometimes so dena but in the bud the esti- 
vation is quite normal with the sepals outsi 
The genus is limited to Australia, and cannot be confounded with any other, although 
the species are ies difficult to distinguish from dried specimens which do not show 
their real c 
Er Apt (the lateral lobes b. to the base), with 2 
gitudinal raised lines on the mi lobe. 
ae, sepals usually much di c "e di Lee 
owers white . : P e. 1. UA AND 
Flowers bluish pur rple 2. D. punctata. 
Lateral dej ied usually scarcely longer than the petals. Flowers 
yello T NE otted or blotched with purple 3. D. aurea. 
Lebéllim 3 3- fd (the la ateral lobes pen » from above the base) 
with 2 longitudinal raised lines on the middle lobe 
rael Jongifudi xf dtd 2 the j^ bellum at some distance 
Lateral Jotos vf p teli as long as or more than half 
s lon middle lobe. Dorsal sepal err as 
Lateral sch ot he petal 4. D. palustris 
min s the much longer "od b. e - a 4 ee D 4 
ral sepals scarcely so lon eem D. maculata. 
Lateral chee “a the labellum rales ‘thal alf » “Ion ng ‘as the 
be. Dorsal sepal usually shorter than the 
vel um. 
Raised longitudinal lines of the labellum T srar” Macon ER PERTE 
Raised longitudinal lines crenulate or cri . . 7. D. palle 
Raised longitudinal lines glabrous a oth pos BD, react 
Raised longitudinal "un closely contiguous so as to appear like 
oe canalicu „and uniting in a single one about the 
mi ie 
Up avena Ai 9. D. setacea. 
2 : rem rere : «S er D emarginata. 
a vy raised longitu 
LI lateral lobes r Eds dr pi dus perri lobe. 
Flowers yellow often viti purple spots . 11. D. sulphurea. 
Labellum lateral lobes nearly as long as "the iniddle lobe. ure 
Flowers purple often mixed with bufFcolour . . . . . . 12. D. longifolia. 
Labellum lateral lobes much shorter than the middle lobe. ; 
Leaves filiform and habit of D. setacea. Flowers yellow . 13. D. pauciflora. 
om the sma owered specimens of 
narrower and one of them often nearly as ren as dis stem below the 
