CoLENSO.— 0;i new Phcenogamic Plants. 83. 



clustered apothecia : all very thickly and almost inextricably 

 growing together, firmly bound down by the very small and 

 twiggy hypogtcous Muhlenbeckia ; and all more or less cut 

 into smalt bits and broken, with their tender parts decayed. 



Order XXXIII.— UMBELLIFEE^. 

 Genus 1. Hydrocotyle, Linn. 



1. H. amoena, sp. nov. 



Plant small, creeping, bright - green, glabrous. Stems 

 hypogoeous, lin.-3in. long, stoutish, liexuous, much branched, 

 rooting at nodes; branches short. Leaves small, scattered 

 singly and in pairs, sometimes three together, orbicular, sub- 

 peltate, 2-4 lines diameter, sinus narrow, 5-ribbed, 5- (rarely 

 7-) lobed ; lobes shallow, tri-crenate, sub-acute, anterior ones 

 imbricate at edges, shining alike on both sides; petioles fin.- 

 IJin. long, stoutish, with a few" weak diverging and retrorse 

 flattish hairs at top under leaf. Stipules small, pellucid, 

 bladdery, margins entire. Peduncles same length as petioles, 

 flexuous, opposite to leaves. Umbels usually 6- (sometimes 

 5-, very rarely 9-) flowered. Involucral leaves 6, oblong, 1- 

 nerved, adpressed ; tips obtuse, coloured. Flowers sessile, 

 pale-pink (as, also, styles, the minu.te calycine teeth, and the 

 central meeting of ribs of leaf) ; petals deltoid-ovate, sub- 

 acute, spreading. Stamens much exserted, longer than 

 petals ; anthers orbicular, didymous, bright-yellow. Styles 

 rather long, curved, diverging. Fruit flattened, glabrous, 

 smooth, ribs indistinct, back obtuse. 



Hab. Hidden among low thick herbage, grassy plains, 

 Tahoraiti, south of Dannevirke, County of Waipawa ; 1887 : 

 W. C. 



Obs. This little species has affinity wath H. intermixta. 

 Col. (" Trans. N.Z. Inst," vol. xvii., p. 240), but differs from it 

 in several particulars (vide descr.). 



2. H. sibthorpioidcs, sp. nov. 



Plant procumbent, creeping, straggling, slender ; main 

 stems lft.-2ft. (or more) long, much branched; branches 6iu.- 

 9in. long, red, hairy, rooting at nodes, each node emitting 

 three thick hairy roots. Leaves pale-green, numerous, dis- 

 tant, sub lin. apart, usually 1 at a node, rarely 2 (and when 



3. near tips of branches, then with two umbels of flowers), 

 small, 4 lines diameter (sometimes 3 or 2|-, rarely 5), thickish, 

 glabrous, but with long weak coarse succulent hairs thinly 

 scattered on veins upper surface, the lower surface generally 

 free from hairs and very glossy ; sub-orbicular-cordate ; sinus 

 broad, 7-veined, 6-lobed : lobes cut one-third through, their tips 

 broad, 5-G lacinio-serrate sub-acute, margins brown ; hairs 



6 



