4 



leharacterised by the abseuce of tlie attacliing anther hairs and the 

 presence of a ring of downwaidly-dlrectcd throat hairs arising 

 from the perianth at the level of the attachment of the anther 

 filaments (;?<:•£: figs. 14, 15, 16). These perianth hairs, forming a 

 ling, are the equivalent of the attachment liairs seen in other 

 species.* A fourth section may be recognised in which there is 

 u group or pencil of hairs behind each anther which is free 

 not attached to the anther in any way. This condition has w.xxy 

 been noticed in one species, T. ijeniciUatum (see fig. 13), which 



ami 

 only 



g papillae 

 or (4) tlie 



Anotlier means of sub-fliviJing tlie species into sections is 

 offered by tlie character of the perianth-segments, anJ a natural 

 sub-division can be made of those species wLieh have a cohspicnous 

 apical beard from those in which the beard is not present. The 

 former or bearded group, BarUata, corresponds in part to De Can- 

 dolle's section Frisea. 



' The latter group, which has been named Imho-hia, showfi ihree 

 or four differing types of flower which are probably not of first- 

 rate importance as distinguishing characters for purposes of 

 classification:— (1) The perianth-segments may be simply hooded 

 with the margins perfectly glabrous, as in T. triflorum or T. 

 tiigromontaniun (figs. 2 and 3); (2) the perianth-segments may 

 be Iringed with minute papillae (J. strictum, fig. 6); (3) the 

 perianth-segments may have a marginal fringe of Ion ' ' 



forming a kind of serrulate edge (7'. Hy.^triv^ fin-. 7) • 

 margins niay be extended to form two lateral flaps o'r lacinulae 

 hs is seen m T.lacmulatum (fig. 5). The three first-mentioned 

 floral types are included in the subsection Suhglahra and the last 

 in the subsection Fimhriata of the section Imherhia. Between the 

 plants with glabrous perianth- segments and those with papillose 

 margins there appears to be no well-marked dividing line. In 

 T stnction the papillae can be clearly seen, but in a few species 

 though present are scarcely noticeable. The longer serrulate 

 fringe of T lU-^trix, T hystricoides and T, horrldum, and the 

 laemulae of 7. lacuiculatnm and T. phuroloma, however, ore 

 definite characters and servo to place tliese five species in the 

 separate subsection Fimhriata. . 



. The disc is another floral feature wliich is not always clearly ■ 

 marked. It is well seen lu T. triflornm (fig. 2, and in T.sfrlctuJ, 

 fig. 0) and in allied species with glabrous EuonijmusAike flower<. ' 

 A .disc or disc-hke 1)ody also appears to occur in some of the 

 bearded species where there is often an orange, somewhat fleshy 

 base to the perianth. -^ 



De Candollot estal,lisl,e,l a section D!,cofJ,em,m on thh 



.^.-.racier ami tljo_a,.o is well marko.l in T. Mftonnn,]: .ZJcm 



* 



1 



