64 CLASS XIX. ORDER IV. 



CLASS XIX. MONCECIA. 



ORDER I. MONANDRIA. 



Zoste'ra. Stamens and pistils inserted in 2 rows upon one side of a spadii; 

 spatha foliaceous. Staminate flowers with the anthers ovate, sessile, alternating 

 with the germs. Pistillate flowers with the germ ovate; style 2-cleft, drupe 

 with I seed, (grass-wrack.) 



Caulin"ia. Staminate flowers : calyx 0; corolla 0; anthers sessile. Pistillate 

 flowers: calyx and corolla warning; style filiform ; stigma 2-cleft ; capsule 1- 

 seeded ; flowers axillary, (river-nymph.) 



Zannici1el"lia. Staminate flowers : calyx and corolla wanting. Pistillate 

 flowers : perianth single of 1 leaf; ovaries 4 or more ; style 1 ; stigma peltate ; 

 capsule sessile. 



EupHOR^BiA. Rarely a perianth ; involucre monophyllous, campanulate 8 to 

 10-toothed, the inner segments membranaceous. Staminate flowers 12 or more ; 

 calyx and corolla generally wanting. Pistillate flowers: solitary, central, stipi- 

 tate; calyx and corolla ; capsule 3-lobeQ. ^'spurge.) 



ORDER II. DIANDRIA. 



Lem"na. Staminate flowers; perianth of 1 leaf; stamens on the base of th-. 

 germ. Pistillate flowers : perianth of I leaf; stig na funnel-form; capsule 1 

 celled, from 1 to 5-seeded. (duck's meat.) 



ORDER III. TRIANDRIA. 



Tt'pha. Amenl cylindric, dense-flowered. Staminate flowers : calyx obsolete. 

 3-leaved ; coi"'ollaO ; stamens 3 together, on a chaffy or hairy receptacle, unitec' 

 below into 1. Pistillate flowers : below the staminate, calyx ; corolla ; seei 

 1, pedicelled; the pedicels surrounded at the base with long hairs resembling 

 egret, (cat-tail, or reed mace.) 



Ca'rex. Aments imbricate, usually in cylindric spikes. Staminate flowers: 

 calyx-scales single ; corolla 0. Pistillate flowers : calyx -scales single ; corolla 

 inflated, monopetalous, 2 toothed at the apex; stigmas 2 or 3; nut 3-sided, en- 

 closed in the inflated, permanent corolla, which becomes an utriculus-like, per- 

 manent aril ; sometimes dioecious, (sedge.) 



Compto'nia. Staminate flowers : ament cylindric, with calyx-scales 1-flower- 

 ed; corolla 2-petalled or none ; filaments 2-forked. Pistillate flowers : spike or 

 ament ovate ; corolla 6-petalled, (the corolla may be called a calyx ;) styles 2 ; 

 nut oval, 1-celled. (sweet-fern.) 



Co'ix. Staminate flowers: in remote spikes; calyx-glume 2-flowered, awn- 

 less ; corolla-glume awnless. Pistillate flowers : calyx-glume 2-flowered ; corol- 

 la-glume awnless; style 2-parted; seed covered with the bone-like calyx. (Job's 

 tear.) Ex. 



Ze'a. Staminate flowers: calyx-glume 2-flowered, awnless; corolla-glume 

 awnless. Pistillate flowers : calyx-glume 2-valved, (number of valves increased 

 by cultivation ;) style 1, very long, filiform, pendulous; seed solitary, immersed 

 in an oblong receptacle. (Indian corn.) S. 



ORDER IV. TETRANDRIA. 



Al'nos. Staminate flowers: ament composedof wedge-form, truncate, 3-flow- 

 ered receptacles; calyx a scale, 3-lobed ; corolla 4-parted. Pistillate flowers: 

 calyx 2-flowered scales, somewhat 3-cleft ; corolla ; seed compressed, ovate, 

 wingless, (alder.) 



Ur"tica. Staminate flowers : calyx 4-leaved ; corolla ; nectary central, 

 cyathiform. Pistillate flowers : calyx 2-ieaved, 2-valved ; corolla ; seed 1, 

 glossy, (nettle.) 



Mo'rus. Staminate flowers : calyx 4-parted ; corolla 0. Pistillate flowers : 

 calyx 4-leaved ; corolla ; styles 2, calyx becoming berry -like ; seed L (mul- 

 berry.) S. 



Bux'us. Staminate floAvers: calyx 3-leaved; petals 2. Pistillate flowers; 

 calyx 4-leaved ; petals 3 ; styles 3. (box.) Ex. 



Amaran"thus. Staminate flowers : calyx 3 or 5-leaved ; corolla 0; stamens 3 

 or 5. Pistillate flowers : calyx and corolla as the staminate ; styles 3 ; capsule 

 1-celled, opening transvei-sely ; seed L (amaranth, red cockscomb.) 



Ambro'sia. Staminate flowers: common calyx 1-leaved ; anthers in contact 

 but not united ; corolla 1 petallcd, 5-clefr, fnnnel-form; receptacle naked Pis- 



