68 CLASS XXI. ORDER I. 



2-valved, many-seeded; seed with egret-like hairs; leaves having a tremulous 

 motion, (poplar, balm of Gilead.) 



Diospy'hos. Calyx 4 to 6-cleft, dilated ; corolla urceolate,4-6-cleft. Staminate 

 dowers: stamens 8 to IG; filaments often with 2 anthers. Pistillate flowers : 

 stigmas 4-5 ; berry 8-12-seeded. (date plum.) S. 



Hippo'PH.E. Staminate flowers: perianth 4-cleft ; stamens 8, alternating with 

 8 glands. Pistillate flowers : perianth superior, campanulate ; style 1 ; stigma 

 oblique; berry 1-seeded. (sea-buck-thorn.) 



ORDER IX. ENNEANDRIA. 



Udo'ra. Spatha 2-parted; perianth 6-parted, 3 inner segments petaloid. 

 Staminate flowers : stamens 9, 3 of them interior. Pistillate flowers : tube of 

 the perianth very long; barren filaments 3; utricle about 3-seeded ; seeds cy- 

 lindric. (ditch-moss.) 



ORDER X. DECANDRIA, 



GyMNocLA'Du.s. Staminate flowcrs : calyx tubular, 5-cleft ; petals 5. Pistillate 

 flowers: style 1; legume 1-celled, pulpy within; seed roundish, large, and 

 hard, (coflee-bean.) 



Car"ica. Staminate flowers: calyx minute; corolla funnel-form, 5-cleft; sta- 

 mens alternately shorter, enclosed in the tube of the corolla. Pistillate flow- 

 ers : calyx 5-toothed ; petals 5; stigmas 5; berry cucumber-form, grooved, 

 1-celled, many-seeded, (false papaw-tree.) S. 



ORDER Xn. POLYANDRIA, 



Menisper"mum. Staminate flowers : calyx 2-bracted, about 6-leaved, cadu- 

 cous ; petals 6-9, glandular, minute, retuse ; stamens 16-24; anthers adnate to 

 the filaments, 4-lobed, 2-celled. Pistillate flowers: germs and styles 3-6; drupes 

 mostly solitary, 1-seeded ; nut lunate, compressed. 



Datis"ca. Staminate flowers : calyx 5-leaved ; corolla ; anthers sessile, 

 about 15. Pistillate flowers: calyx superior, 2-toothed; styles 3; capsules 3- 

 angled, 3-horned, 1-celled, many-seeded, (false hemp.) 



ORDER XV. MONODELPHIA. 



Junipe'rus. Staminate flowers : ament ovate, whorled; calyx a peltate scale ; 

 anthers 4 to 8. Pistillate flowers: calyx 3-parted; petals 3; styles 3; berry 1 

 or 2-seeded ; nut long, 1-celled, with balsamy glands at the base, (red cedar.) 



Tax"us. Staminate flowers : calyx consists of 4 to 6 imbricate scales ; corol- 

 la 0; stamens 8 to 10 ; anthers peltate, 6 to 8-cleft. Pistillate flowers : style : 

 receptacle succulent ; nut or drupe fleshy ; 1-seeded. (yew.) 



CLASS XXI. CRYPTOGAMIA. 



ORDER I. FILICES. 



A. Capsule having an elastic ring at right angles loith its opening. 



Polypo'dium. Capsules disposed in round, scattered fruit-dots, (or clusters of 

 capsules,) on various parts of the lower surface of the frond ; involucrum I. 

 (polypod.) 



Aspid"jum. Capsules in scattered, roundish fruit-dots, on various parts of the 

 whole lower surface of the frond; involucrum a kidney-form, or round mem- 

 brane, fastened to the frond in or near the centre of the fruit-dot, and opening 

 on all sides, or to one side of the fruit-dot, and opening on the other. The in- 

 volucrum, when a little opened, is often peltate, (shield-fern.) 



Pter^is. Capsules arranged in a continued line along the very margin of the 

 frond; involucres opening inward, being formed of the inflexed margins of the 

 fronds. When the leaves are extremely small, the rows of capsules on oppo- 

 site sides meet and cover the lower surface, (brake.) 



Adian"tum. Capsules disposed in oblong fruit-dots, arranged along the mar- 

 gin of the frond ; involucrum is formed by turning back the margin of the frond 

 over the capsules, and it opens inward. The lines of oblong spots are gene- 

 rally along that margin, which may be considered the end of the leaf, or of the 

 segments of the leaf, (maidenhair.) 



Onogle'a. Fruit-dots indeterminate, presenting a berry-like appearance ; cap- 

 sules covering the whole lower surface of the frond; involucrum formed by 

 turning in or rolling back the margin of the leaf, which opens inward, in ma- 



