552 PAET III. — THE CLASSIFICATION OF PLANTS. 



the perigynium. In Kobresia (Elyna) the second bract is not tubular, and 

 therefore does not completely invest the ovary. In consequence of there being 

 a second bract, the odd carpel of the trimerous gynseceum is posterior : when 

 the gynseceum is dimerous, the two carpels are lateral. 



The genus Carex, the Sedge, contains numerous species which grow mostly 

 in damp localities ; they have stiff leaves with sharp or saw like edges. Only a 

 few of them are dioecious (C. dioica, scirpoidea) : in most the ^ and $ in- 

 florescences occur on the same axis. In one large section of them the two 

 kinds of flowers occur on the same spike which is either ^ at the base and ? 

 at the top, or vice versa. When this is the case the axis bears either only one 

 terminal spike, as in Carex pulicaru and G. paucijlora, or several spikes 

 forming a capitulum at the apex, as in C. cyperoides, or a spike or a panicle, 

 as in G. murlcata, arenaria, &nd paniculata. In a second section, on the other 

 hand, each spike is monosporangiate, and then the ^ spike is almost always 

 terminal on the axis and the ? lateral, as in Garex acuta, glauca, pracox, 

 diffitata, flava, and palndosa. 



Cohort 2. Restiales. Ovary usually multilocular ; a single 

 orthotropous and suspended ovule in each loculus ; hence in the 

 seed the radicle of the embryo is directed away from the hilum 

 (enantiohlastic) . Flovrers monosporangiate, rarely ambisporangiate, 

 with bracts : floral formula K3, (73, AS + 3, 0(3), but occasionally 

 some of the members are wanting. 



Order 1. Eriocaulonacej]. Flowers monosporangiate, in 

 capitula, often monoecious in the same capitulum. or rarely 

 dioecious : stamens generally in two whorls, anthers generally 

 bilocular: ovary 2-3-locular : seed ribbed. 



Eriocaulon septangnlare, the Jointed Pipewort, occurs in the Hebrides and 

 on the west coast of Ireland : other genera mostly tropical : generally marsh- 

 plants. 



Order 2. Restiace^e. Flowers usually dioecious by suppression, 

 in spikes : only the inner whorl of stamens is present, anthers 

 generally bilocular : ovary 1-3-locular : seed smooth or tubercu- 

 late. 



These are grass-like sub-tropical plants living in the southern hemisphere. 

 This order includes the group Centrolepidaceffi (Desvauxiacere, Lindl.) ; in these 

 the perianth is much reduced, the <? flower probably has only one stamen, and 

 the ^ one or more monomerous ovaries. 



