i 
eo QO 1b Spikes two or more, sither stalked or sessile, remote or 
/ congested into a terminal head which may resemble a single 
4! spike but on examination will be found to be compound and 
Verhatheds achenes either triangular or flat; stigmas 2 or 8 
2 3a,Stigmas prevailingly 2; achenes prevailingly flattened and 
Z, ( Watoh~shaped (occasional ones sometimes obscurely 2 — we ae 
\ angled ) 2 ? 
4 Perigynia rounded at th&ytip and beakloss ghbkectones}— 6, Co aurea : 
‘/ Perigynia tapered at the tip to a distinct beak which 
/may be o2-.3 mm. long and entire or 1-2 mn. long 
«Cand bidentate at the apex 
6 4a,Lateral spikes rarely more than 1 om. long, mostly 
5-8 mms long; perigynia tapering gradually into 
| & beak which ig seldan less than 1/3 as long as 
the body, with sharp margins which are minutely F 
/ O.  eilielate-toothed except C. dis which has ; 
\ &mimte entire beak; C. illota halts sometimes 
\ entire beak but both of these have 1 lateral 
\ spikes) ; Scales brown or hyaline 
