CoLENSO. — On neio Fhanogamic Plants. 89 



glabrous and reddish on the outside, very loosely cottony 

 within, mid-rib on under surface glabrous (and also the whole 

 upper surface in age). Scape single, very slender. Tin. -Sin. 

 long ; bracts setaceous, 3-4 lines long, very acute, rather dis- 

 tant (6-7 on scape), and closely appressed. Head small, loose, 

 spreading, -J-in.— |in. diamecer. Involucral scales few, some- 

 what disposed in 3 rows (of san:ie length as disc-florets and 

 pappus), 5 lines long, the outer ones the shortest, linear-acumi- 

 nate with 1 dark central vein, slightly cottony on the outside, 

 tips very acute, margins finely serrulate and ciliate with weak 

 shaggy hairs. Eay-fiorets 14, distant, sub-lanceolate, 5^ lines 

 long, 4-veined, extending far beyond stigmata ; tips obtuse, 

 1-notched; tube 2 lines long, about one-third length of floret. 

 Disc-florets few, 8-10; stigmas long, subulate, curved, very 

 tuberculate ; tubercles liiiear, obtuse. Pappus pale-reddish, 

 short, nearly equal in length, about as long as tube of ray- 

 fl.orets, scabrid ; tips acute and bifid. Achene linear, Ih lines 

 long, angled somewhat 4-sided, glabrous. 



Hah. On opeii ground, high slopes of Mount Tongariro, 

 County of East Taupo ; 1887 : Mr. H. Hill. 



Obs. This slender species is more nearly allied to C. longi- 

 folia, Cass, (a common New Zealand, Australian, and Tas- 

 manian plant), but differs from that species in many particulars 

 — as, in its single habit of growth, its shorter filiform leaves, 

 more slender scapes with shorter setaceous cauline bracts, 

 much smaller head and fewer ray-florets, shorter and glabrous 

 achenes with pappus-bristles nearly equal. Bentham says of 

 C. longifoUa : " Eay-florets above 30; achenes fully 3 lines 

 long, more or less silky-pubescent. Pappus-bristles very un- 

 equal, the shortest half as long as the longest." (" Fl. 

 Australiensis," vol. iii., p. 489.) I quote from Bentham (who 

 also notices our New Zealand plant from Hooker f.) as being 

 the latest work, with a fuller specific description. 



Genus 17. Senecio, Linn. 



1. S. pumice^is, sp. nov. 



Plant a sub-erect glabrous perennial herb, 2ft. -3ft. high; 

 stems striate, stout below, ^in. diameter, much branched 

 above, slender and sub-flexuous ; flowering stems 8in.-10in. 

 long ; striae broad, flattish, yellow-brown. Leaves light-green, 

 purple on under surface, sessile, half-clasping : the lower ones 

 on main stevis close, oblong, 4|^in. long, l|-in.-2in. broad, sub- 

 membranaceo-coriaceous, somewhat wrinkled, veins anasto- 

 mosing, prominent below also the mid-rib ; margins grossly 

 serrate and slightly revolute ; tip acute ; base cordate : the 

 %il)loer leaves on Jioioering stems linear-oblong (sometimes 

 lanceolate), 2in.-3in. long, ^in.-lin, wide, sparingly toothed 



