344 Transactions. — Botany. 



Plate XXIV., fig. 1, plant nat. size; 1 a, flower; 1 b, pod; 1 b', seed; 

 1 c, 1 c', leaves. 



The present plant was collected on Mount Alta, Wanaka Lake District, 

 where it is found on exposed ridges not under 5,000 feet alt., either in firm 

 shingle or in crevices of the rocks, where it is often surrounded by snow. 

 The progress of flowering and seeding is rapid, as the heat during the day 

 in sunshine at these high altitudes is intense, producing a rapid vegetation. 

 Pachycladon glabra, Buchanan, n.s. 



A short depressed, glabrous, alpine plant. Eoot long, fusiform, -|— iinch 

 diameter, bearing 1-2 stout branches, each terminating in a loose rosulate 

 head of long slender leaves. Leaves f-1 inch long including the petiole, in 

 irregular series, pinnatifidly lobed and narrowed into long flat petioles. 

 Scape leaves long narrow linear. Scapes few, shorter or longer than the 

 leaves, and rising from the branches below them, 1-3 flowered. Flowers 

 white, i inch long. Sepals hnear-obovate, petals longer than the sepals, 

 narrow linear-obovate, rounded at top, tapering at bottom to a narrow point; 

 stamens six, two longer than the others ; pods ^ inch long, -^ inch broad, 

 laterally compressed, linear, septum complete ; seeds 8-10 in each valve, 

 ovoid. 



Hab. — Mountain range, head of Lake Ohou, 5,000 feet alt. — Buchanan 

 &-ndi McKay, 1881. 



Plate XXIV., fig. 2, plant nat. size; 2 a, flower; 2 b, b', pod and sec- 

 tion ; 2 c, leaf. 



The present plant may probably be considered as only a form of Pachy- 

 cladon novcE-zealandia, produced by climatic causes ; the prevailing hot 

 winds of the Lake Ohou District, where it was collected, being well known 

 to exercise a great influence on the vegetation of both mountain and low 

 lands. The upright habit and glabrous parts however of the present plant 

 with other changes in the inflorescence necessitate a distinguishing name. 

 Notothlaspi notabilis, Buch., n.s. 



A small circular densely-leaved biennial (?) plant, with the inflorescence 

 forming a terminal sphere of small white flowers ; stem none ; leaves 

 numerous, |-1 inch long, spathulate, crenate on the upper half, sparsely 

 covered on margins and surface with ribbon-like hairs, 1-veined, and pitted 

 on the surface ; scape, 1-2^ inches long, hollow, apparently formed by the 

 union of the petioles, thus probably relegating the leaves to flower bracts ; 

 pods, \ inch long, obovate, with a very short style. 



Hab. — Mountain range, head of Lake Ohou, 3,000 feet alt. — Buchanan 

 and McKay, 1881. 



Plate XXV. figs. 1, 2, plant nat. size, different views; 3, flower; 4, pod; 

 6, leaves, both sides ; 6 a, portion of leaf much enlarged. 



