﻿Buchanan. — On some New Species of Plants. 227 



branous. Florets numerous, those of the ray \ inch long, straight or spreading, 

 revolute in old flowers ; disc flat, deeply pitted ; achene silky. 



Collected by H. H. Travers, on the mountains near Lake Guyon, Nelson, 

 March, 1871. 



Plate XY. — Fig. 1, 712^^% natural size. 2. Head newly opened. 3. Floret 

 of the disc. 4. Floret of the ray. 5. Ai-ms of style. 6. Gland of style. 

 7. Stamen. 8. Pappus. 9. Outer involucral scale, 10. Inner involucral 

 scale. All magnified. 



Rostkovia Novae Zelandioe, Buchanan, n. sp. 



Culms rising from a creeping rhizome, tufted, rigid, very narrow, 6-8 inches 

 long, terete, finely grooved. Leaves numerous, rigid, very narrow, shining, 

 plano-convex, terete near the top and pungent, each culm sheathed by three 

 leaves to above the middle ; leaves ^ longer than the culms, enveloped below 

 by 3 blunt apiculate sheaths. Flowers solitary, terminal, f inch long, 1 

 bracteate ; bract membranous j^ inch long, very broad, entire, or sometimes 

 bifid to the base. Perianth of 6 leaflets, pale brown, unequal, 3 outer longest ; 

 leaflets linear oblong, acute, with a membranous border ; stamens 6, included ; 

 anthers long linear ; stigma not seen, apparently falling ofi" on the splitting of 

 the capsule ; capsule J inch long, oblong, acute, bluntly triangular, coriaceous, 

 dark brown, shining, 1 celled, loculicidally dehiscing by splitting at top into 

 3 valves. Seeds numerous, small, pale coloui^ed, narrow, outer membrane 

 produced at both ends, and thickened on one side, forming a white pearly ridge. 



New to New Zealand, and closely allied to Rostkovia gracilis, a plant 

 of the Auckland and Campbell Islands, from which it difiers in having three 

 short leaves on each culm instead of one long leaf, as described in Hooker's 

 " Antarctic Botany." 



Collected by H. H. Travel's, on the Nelson mountains, at an altitude of 

 3,000 feet ; and by Dr. Haast, on the mountains of Canterbury. 



Plate XYI. — Fig. 1. Plant, natural size. 2. Flower, 3, Pipe capsule. 

 4. Section of capsiile, 6 , Seed. 6. Old stamen. All magnified. 



Car ex pyrenica, Wahlenburg, n. sub-sp, 

 A marked variation from this species is found on the mountains of the 



South Island. 



Culms 5-8 inches high. Leaves about equal in length to the culms, soft 



and erect ; spikelet pyi-iform, dark brown ; glumes with a stout nerve ; 



utricle with the beak dark brown and acute ; stigmas 2, twisted back in fruit ; 



nut ovate, flattened, smooth, pale brown. 



Collected by me on the mountains of Otago ; found previously only on the 



mountains of the North Island. See description of sp. in " Handbook of N.Z, 



Flora." 



