740 
Ovary l-chambered, containing a single ovule, forming an achene which is 
surmounted by the usually persistent tthouch-semetimes deciduous) papous; 
assisting in-teuitedissominatiems the achene (especially in Tribe Cichoriese) 
may be attenuated into a slender beak which in turn bears the vapous 
Note: In Xanthium and Arctium the heads may be of two forms, one 
containing staminate flowers only, cup-shaped, formed from distinct or 
coalesced bracts, the other containing pistillate flowers: burr-like contain- 
Su Aft ee od. 
ing two flowers, or nutlike containing a single flower, “jihe dise florets 
may frequently be unisexual, the flowers of each sex sometimes occurring 
on different individuals, thet—isy—diececious, as in Antennaria; the pistillate 
flowers may sometimes be associated in the same head with perfect flowers, 
sometimes vith as ee) al as in Anaphalis., In Madia and Lagophylla the 
f all 
involucral bracts “curl, ais end invest the marginal Flowers and achenes, 
CU ALA 
la, cads entirely Similar flowers “she corollas of which a 
‘into a flat oblong or Svrap-sheved limb which i 
re expanded 
ni vy; Ss 
“I N\the avex; herbs vith milky juice 
toothed at 
2 Papzus consisting ot’ 
‘like; flo 
ce 
e 
ranenes, slg 
<5 oe of small thin sco ‘les, not bristles 
in ssile clusters along the nearly naked 
J vs i ichoriun 
a nee 
|) 
Zz Fanonpus consisti ing, of 1 or more series of' soft bristles 
elt 
which in 
hair-like 
but barbed or » umose; flowers terminal on elongated 
\oiven naled veduncles or in terminal clusters 
ssecics are expanded at the ba .S@, ovhervwise 
