390 Transaclions.- — Botany. 



cordate, lateral margins straight ; tip rouuded, apiculate ; 

 petiole short, 1-1^ lines long. Flower solitary ; dorsal sepal 

 thin, very long, fin., lanceolate acuminate much overhanging, 

 many-nerved ; tip recurved ; brownish-purple dashed on out- 

 side with linear purple dots ; lateral sepals and petals narrow 

 filiform, -lin.-fin. (sometimes l-Mn.) long, sub-erect, 1 line 

 broad and" 1-nerved below ; lip dark purple-red, orbicular, 4-5 

 lines diameter, apiculate, margin entire, but under lens 

 minutely and regularly denticulate, much-nerved ; nerves 

 distant, forked at tips, and extending to margin. Ovary 

 narroAv-oblong, iin. long, striate, brownish. 



Hah. South Island: "Mount Cook, Black-birch Creek 

 A'alley;" 1890: Mr. II. Sutcr. 



Obs. Although I have received good dried and mounted 

 specimens of this pretty little plant from its kind discoverer, 

 they are not well fitted for minute microscopical dissection, 

 having been too severely pressed. But this plaiit differs from 

 our described New Zealand (and Australian) ones, in its thin 

 elliptic and straight-edged leaf, and in the large orbicular and 

 entire lip of its flower. 



Class III. CEYPTOGAMIA. 



Order I. Filices. 



Genus o. Hymenopliyllum, Sm. 



1. H. truncatinn, sp. nov. 



Sub -prostrate, depressed, thickly overlapping, matted, quite 

 glabrous ; roots slender, creeping. Fronds l-|in.-2in. long, 

 broadly ovate and sub-deltoid, of a pleasing light-green colour 

 (reddish-tinged in age), 3-4 pinnatifid. Pinme alternate; 

 main rachis and secondary rachises much-winged ; wings 

 crisp; segments numerous, close, linear, sub-secund, inclined 

 below surface of rachises, serrate ; serratures large, distant, 

 blunt ; tips truncate, dilated, 2-3-toothed, sometimes fork- 

 veined and enipa'ginate ; veins not extending to margins. Cells 

 dusky, distinct, irregular, of various shapes and sizes, with 

 wide darker intercellular passages betv^'een ; their centres 

 pellucid, irregular in shape ; larger by sides of veins, and very 

 small and more regular in form and compact at margins, giving 

 the segments a thickened sub-marginal appearance. Stipe 

 lin.-2in. long, dark-brown (also rachis and secondary rachises), 

 narrowly winged to base, with scattered red hairs when young ; 

 involucres few on frond, confined to upper pinnae, usually 

 solitary, or 2 (rarely 4-5) on a pinna, and only showing on 

 the upper side, full, supra-axillary, very large, broadly sub- 

 orbicular, or orbicular-flabelliform, paler green than and of 

 different substance from the frond ; valves large, free three- 



