CLASS XVIII. XIX. 159 



flat, chaffy ; egret 2-leaved, chaff-like, caducous. (sunflower, Jerusa- 

 lem artichoke.) 



CLASS xvin. GYNANDRIA. Stamens growing out of the pistil. 



Order 1. Monandria. One stamen. 



A. Anther adnate, sub-terminal, not caducous ; masses of pollen affixed, 

 by the base, and made up of angular particles. 



OR"CHIS. Corolla ringent-like, upper petal vaulted ; lip dilated, 

 spurred beneath: masses of pollen 2, adnate, terminal. (orchis.) 



Order 2. Diandria. Two stamens. 



CYPRIPE'DIUM. Calyx coloured, 4-leavcd, spreading ; corolla 0, (by 

 some the calyx is called d corolla;) nectary large, hollow, inflated; 

 style with a terminant lobe, and petal-like appendage on the upper 

 -side. (lady's slipper.) 



Order 5. Pentandria. Five stamens. 



Plants bearing seeds in follicles ; and pollen in masses called pollinia. 



ASCLE'PIAS. Petals 5, reflected ; nectaries 5, concave, erect, con- 

 taining little horns ; each stamen with a pair of pendulous masses of 

 pollen, suspended from the top of the stigma ; follicles smooth. 

 (milk-weed, silk-weed.) 



CLASS xix. MONCECIA. Staminate and pistillate Jlowers on the 



same plant. 



Order 3. Triandria. Three stamens. 



TY'PHA. Ament cylindric, dense-flowered. Staminate flowers 

 calyx obsolete, 3-leaved : corolla ; stamens 3 together, on a chaffy or 

 hairy receptacle, united below into one. Pistillate flowers below the 

 Staminate; calyx 0; corolla 0; seed 1, pedicelled; the pedicels sur- 

 rounded at the base with long hairs resembling an egret. (cat-tail or 

 reed mace.) 



CA'REX. Aments imbricate (usually in cylindric spikes.) Stami- 

 nate flowers calyx scales single ; corolla 0. Pistillate flowers calyx 

 scale single; corolla inflated, monopetalous, 2-toothed at the apex: 

 stigmas 2 o 1 * 3 ; nut 3-sided, enclosed in the inflated, permanent corolla, 

 which becomes an utriculous-like permanent aril. Sometimes dioeci- 

 ous. (sedge.) 



COMPTO'NIA. Staminate flowers ament cylindric, with calyx scales 

 1 flowered; corolla 2-petaled or none; filaments 2-forked. Pistillate 

 flowers spike or ament ovate ; corolla 6-petaled (the corolla may be 

 called a calyx ;) styles 2 ; not oval, 1-celled. (sweet fern.) 



ZE'A. Staminate flowers calyx glume 2-flowered, awnless ; corolla 

 glume awnless. Pistillate flowers calyx glume 2-valved (number of 



