Descriptions of New Native Plants. By D. Petrie, M.A., Ph.D., F.N.Z.Inst. [Read before the Auckland Institute, 25th November, 1924; received by Editor, 28th November, 1924; issued separately, 6th March, 1926.] Plates 2,3. Carex McMahoni sp. nov. Species C. Buchanani (Berggren) similis; differt foliis laete viridibus, longe acuminatis, pendentibus; culmis trigonis laevibus, folia permultum excedentibus; spiculis 5–7 crassioribus, ad culmorum apices approximatis sessilibus, duabus supremis masculis; utriculis minoribus, tenuiter plano-convexis, ellipticis, subalatis, plurinerviis, a parte dimidia superiore delicate serrulatis; rostro brevi bifido serrulato. Densely tufted, dark green; culms numerous, slender, smooth, trigonous, erect below widely drooping above, 90–110 cm. (3–4 ft.) high; leaves considerably shorter than the culms, narrow-striate, keeled, more or less com plicate below, delicately scabrid along edges, slightly recurved in upper half, produced into long acuminate tips; spikelets 5–7, sessile, closely placed at tops of culms, linear-oblong, cylindrical, rather stout, 3–3.5 cm. (1 ¼ in.) long, 5 mm. broad, the terminal 1 or 2 male (the lower much the smaller and sometimes partially female), the remainder female, a slender and abortive spikelet on a long filiform peduncle often springs from axil of uppermost leaf; bracts long and leaf-like; glumes shorter than utricles, broadly obovate, thin, pale, 1-nerved, wavy and bifid above, produced into a fairly long thin smooth whitish mucro; utricles rather small, shortly stipitate, elliptic, thinly plano-convex, slightly winged along edges, many-nerved on both surfaces, finely serrate along upper half; beak short, bifid, sparsely serrate. Hab.—Pelorus Valley, Sounds County: J. H. McMahon! I have pleasure in naming this fine species after Mr. McMahon, who has rendered me many valuable services. Carex Coxiana sp. nov. Culmi 45 cm. (18 in.) alti, rigidi erecti triquetri, vix graciles leves, folia vix aequantes; folia linearia, a medio 0.8 cm. (⅖ in.) lata, plerumque plana subcoriacea, utrinque tenuiter ac conferte striata, marginibus sub-revolutis, in apices longiusculos filiformes producta; inflorescentia spicula infima duplo longior; spiculae 6–7 approximatae, sursum gradatim breviores, sessiles vel subsessiles robustae fulvae; infima 3 cm. (1 ½ in.) longa 5 mm. lata, summa mascula claviformis, 3 cm. (1 ⅕ in.) longa, subrobusta; glumae utriculos superantes, ovato-oblongae, plerumque integrae, in aristam brevem levemque productae, apicibus bifidis vel integris; styli 3; utriculi pallidi ± nitentes leves ovoidei, in rostrum subbrevem bifidum angustati, ± plano-convexi, nervis lateralibus duobus percursi, cetera enervia; nux obovoidea, obtuse triquetra, subacuta. Culms about 18 in. high, stiffly erect, somewhat shorter than leaves, triquetrous, rather slender, smooth; leaves shortly sheathing, almost