29 



about half as long as the achenium ; corolla of bisexual flowers 

 four-toothed, glandless; their anthers almost enclosed; fertile achenia 

 clavate-cylindrical, slightly glandulous. 



On swampy places of Chatham-Island. 



Stems rooting. Leaves in circumference obovate or elliptical, 

 generally 2-3" long, with a petiole of about 1" length ; segments 

 generally approximate or the lower ones somewhat remote, flat ; the 

 upper ones 3-5'" long, the others gradually smaller ; the marginal 

 incisions short and rather unequal ; the teeth acute. Peduncles 2-3" 

 long, solitary. Capitula strongly odorous. Scales of involucre 1-1 5'" 

 long, except the outermost blunt. Receptacle closely dotted by the 

 rudimentary pedicels. Female flowers in many rows, somewhat 

 more numerous than the bisexual ones ; the corolla of the former 

 about g"' long ; their style almost entirely enclosed ; the minute 

 bilobed stigma exserted ; the achenia 5-f "' long. Corolla of the 

 bisexual flowers nearly V" long, obconic-cylindrical, glabrous ; their 

 style undivided and almost or entirely enclosed ; anthers about ^"' 

 long, acute at the apex, not caudate at the base ; the achenia ^"' 

 or less long. 



Leptinella scariosa (Cassini, Bullet. Philomat. 1822, 127 ; L. 

 acsenoides. Hook. & Am. in Hook. Journ. of Bot. iii. 325) is distin- 

 guished by the paucity and orbicular form of the involucre-scales, 

 by the almost uniseriate female flowers and the different shape of 

 their corolla. , ^ 



Leptinella lanata (J. Hook. Flor. Antartic, i. 26, t. 19) differs 

 in its woolly indument, in its much smaller leaves with two- or few- 

 toothed segments, in shorter densely woolly peduncles, gland-dotted 

 corollse, of which the peripherical ones are longer than their achenium 

 and of an ovate-cylindrical form. 



Leptinella plumosa (J. Hook. Fl. Antartic. i. 26, t. 20) recedes 

 in a more copious almost silvery indument, often larger leaves, the 

 segments of the latter deeper dissected and their secondary lobes 

 slit into more narrow and acute teeth, in less numerous though not 

 uniseriate involucre-scales, in female coroUse about twice as long 

 as broad and rather longer than the achenium and in five-toothed 

 bisexual flowers. 



Leptinella propinqua {J. Hook. 1. c. i. 27) approaching L. poten- 

 tillina nearest, is recognized by an again denser woolly indument, 

 more divided segments of the leaves with acuter lobes, less numerous 

 involucre-scales and gland-dotted coroUse, and perhaps also by the 

 structure of flowers and fruits. 



