CXXI. DIPSACE^. 



493 



Calycera, 



Fmit crowned by the 

 accrescent calyx. 



Calyfera. 



Anatropous ovule 

 (mag.). 



Calycera. 



Cylindric embryq 



(mag.). 



Calycera. 



Seed cut 



vertically (mag.). 



Calycerea is closely allied to Composite, but is distinguished by the nervation of the corolla, monadel- 

 phous filaments, position of the ovule, absence of collecting hairs, globose stigma, and albumen. It is. 

 equally near Dtpsacea, from which it differs in the alternate leaves, valvate aestivation, and monadel- 

 phous and syngenesious stamens. The species are not numerous, and mostly inhabit temperate South 

 America. 



GXXI. D IPS ACE ^E. 



(DIPSACE^E, A. L. de Jussieu.} 



COROLLA monopetalous, epigynous, (estivation imbricate. STAMENS 4, inserted on 

 the tube of the corolla. OVARY \-celled, 1-ovuled, adnate to the receptacular tube 

 throughout its length, or only at the top ; OVULE pendulous, anatropous. EMBRYO 

 albuminous. 



Annual or perennial HERBS. LEAVES opposite, rarely whorled, exstipulate. 

 FLOWERS perfect, more or less irregular, gathered into a dense capitulum, involu- 

 crate, on a naked or paleaceous receptacle, very rarely in a whorl in the axil of the 

 upper leaves, and each furnished with a calyciform obconic involucel, the tube of 

 which is pitted at the top or furrowed lengthwise, and its limb scarious. CALYX 

 superior, cup-shaped, or in setaceous segments forming a naked or bearded plumose 

 crown. COROLLA superior, monopetalous, tubular, inserted at the top of the recep- 

 tacular tube; limb 5-4-fid, usually irregular, sometimes labiate, ssstivation imbricate. 

 STAMENS 4, often unequal, rarely 2-3, alternate with the corolla-lobes, inserted at 

 the bottom of the tube ; filaments exserted, distinct, or rarely united in pairs ; anthers 

 introrse, 2-celled, dehiscence longitudinal. OVARY inferior, 1-celled, 1-ovuled, some- 

 times free in a receptacular tube which is closed at the top, sometimes adhering to 

 this tube throughout its length, or at the top only ; style terminal, filiform, simple, 

 united at its base to the neck of the receptacular tube ; stigma simple, clavate, or 

 very shortly and unequally 2-lobed ; ovule pendulous from the top of the cell, ana- 

 tropous. UTRICLE enclosed in the receptacular tube and the involucel. SEED 

 inverted, testa membranous, hardly separable from the pericarp. EMBRYO straight, 

 in the axis of a fleshy scanty albumen ; radicle superior. 



* Dipsacus. * Morina. 



GENERA. 

 * Cephalaria. Knautia. * Scabiosa. Pterocephalus. 



