576 



SYSTEMATIC BOTAKY. 



Fig. 952. Labiate floret of Chcetanthera linearis, o. Ovary with adherent 

 calyx, t. Tube of the corolla. Is. Upper lip of corolla, 1 i. Lower lip. 

 e. Tube formed by the adlierent anthers, s. Stigmas Fif/. 953. Ver- 

 tical section of the floret of Aster rubricaulis. o. Erect ovule, enclosed in 

 the inferior ovary, a. Limb of the calyx. ;;. Corolla, s. Style, e. Tube 



of the anthers Fig. 954. Floret of the Chicory {dehor i urn J ntybus). o. 



Ovary with adherent calyx, e. Tube formed by the adherent anthers, s. 



Stigmas Fig. 9.jo. Vertical section of the ripe fruit of a Groundsel 



iSenecio), surmounted by a portion of the style, s ; and the hairy limb of 

 the calyx, p. Pericarp t. Testa, e. Seed. The above figures are from 

 Ju£8ieu. 



with membranous scale-like bractlets (called paJe<x) {fig. 381). 

 Calyx superior {fiys. 952 — 9.54), its limb either entirely abortive 

 {fig. 450), or membranous {fig. 451), and then entire or toothed; 

 or pappose, — that is, divided into bristles, or simple, or branched, 

 or feathery hairs {fig. 953). Corolla monopetalous {figs. 952 — 

 954), tubular {fig. 451), ligulate {fig. 954), or bilabiate {fig. 

 952), 4 — 5-tootlicd, with a valvate aestivation. Stamens {figs. 

 952 — 954 e) 5, or rarely 4, inserted on the corolla, and alternate 

 with its divisions; filaments distinct or monadelphous; anthers 

 united into a tube {syngenesious or syuantheroiis) {fig. 536), 

 which is perforated by the style {fig. 954), Ovary inferior, 1- 

 celled, with 1 erect ovule {fig. 953): style 1, undivided below, 

 and commonly bifid above {fig. 956) : stigmas 2, one being 

 placed on tlic inner surface of each division of the style {fig. 

 956). Fruit dry, indchiscent, 1 -celled, (called a cypscla), crowned 

 by the limb of the calyx which is often pappose {fig. 955). 

 Seed {fig. 955) solitarv, erect, exalbuminous; radicle, inferior 

 {fig. 955 c). 



