368 CLASS XXI. ORDER I. 



ORDER IV. TETRAHDRIA. 



VIS"CUM. Staminate flowers calyx 4 parted ; corolla ; anthers sessile, 

 adhering to the calyx. Pistillate flowers calyx 4 leaved, superior ; corolla ; 

 style ; berry 1 seeded, globose ; seed cordate; (parasitic, adhering to trees). 

 43. 58 ^misletoe). S. 



ORDER V. PINTANDRIA. 



ZAKTHOX"YLUM. Staminate flowers calyx 5 parted ; corolla ; stamens 3 

 to 6. Pistillate flowers pistils 3 to 5 ; capsules equal to the number of pistils, 



1 seeded. 46. $4 (prickly ash, or tooth-ache tree). S. 



HuM"uLU9. Staminate flowers calyx 5 leaved ; corolla ; anthers with 



2 pores at the extremity. Pistillate flowers calyx 1 leaved, entire, oblique, 

 spreading ; styles 2 ; seed 1, within the leaf-like calyx ; inflorescence strobile- 

 form. 53.98 ( hop). S. 



Exotic. 



CAN".V\BIS. Staminate flowers calyx 5 parted. Pistillate flowers calyx 

 5 leaved, entire, gaping laterally ; styles 2; nut 2 valved, within the closed 

 calyx. 53. 98 (hemp). 



SPINA'CIA. Staminate flowers calyx 5 parted ; corolla 0. Pistillate flow- 

 ert styles 4 ; seed 1, within the indurated calyx. 12. 29 (spinach). 



ORDER VI. HEXANDRIA. 



SMI'LAX. Staminate flowers calyx 6 leaved ; cprol ; anthers adnate to 

 the filaments. Pistillate flowers style minute: stigmas 3; berry- 3 celled, 

 superior, 13 seeded. 11. 12. S. 



ORDER VIII. OCTANDRIA. 



PO'PULUS. Staminate flowers ament cylindric, calyx a torn scale ; corolla 

 tnrbinate, oblique, entire, supporting 8 to 30 stamens. Pistillate flowers 

 ament, calyx and corolla like the Staminate ; stigma 4 or 6 lobed : capsule 2 

 celled, 2 valved, many seeded ; seed with egret-like hairs. (Leaves having 

 a tremulous motion;. 50. 99 (poplar, balm of Gilead). 5. 



ORDER XII. POLTANDRIA. 



MENISPER"MUM. Staminate flowers. Calyx 2 bracted, about 6 leaved, ca- 

 ducous ; petals 69, glandular, minute, retuse ; stamens 1624 ; anthers ad- 

 nate to the filaments, 4 lobed, 2 celled. Pistillate flowers.- Germs and styles. 

 36 ; drupes mostly solitary, 1 seeded ; nut lunate, compressed. 11. 77. 5. 



CLASS XXI. CRYPTOGAMIA. 



ORDER I. FIUCE3. 



A. Capsule having an elastic ring at right angles with 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 : irivolucrum 

 none. 55. 5 fpolypod). -S. 



ASPID"IUM. Capsules in scattered roundish fruit-dots on various parts of 

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

 membrane, fastened to the frond in or near th,e centre of the fruit-dot, and 

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

 ('The involucrum, when a little opened, is often peltate). 55. 5 (shield- 

 fern). AV. 



PTER"IS Capsules arranged in a continued line along the very margin of 

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

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

 opposite sides meet and cover the lower surface). 55. 5 (brake). 5. 



ADIAN"TUM. Capsules disposed in oblong fruit-dots, arranged along the 

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

 frond over the capsules, and it opens inwards. (The lines of oblong spot* are 

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

 of the segments of the leaf . 55. 5 (maidenhair). S. 



OINOCLE'A. Fruit-dots indeterminate, presenting a berry-like appearance ; 

 capsnles covering the whole lower surface of the frond ; involucrum formed 

 by turning in or rolling hack the margin of the leaf, which opens inwards, in 

 maturity, towards the midrib, or remains closed. The fertile leaves are con- 

 tracted and narrower than the barren ones. 55. 5 (sensitive polypod). S. 



