Ivi NATURAL SYSTEMS. [Lindley. 



Class n. ACROGENS. 

 Alliances of Acroukn.-.. 

 I Miscales.— < rvascular), S^ore-cases immersed or calyptrate (i. e. either plunged in the 



substance of the frond, or a hood having the same relation to the spores 



as an involucre to a seed-t' I 



5. I.vcopoDALKS— Vascular, Spore-cases axillary or radieal,one or many-ceUed. Spores of two sorts. 



6. In. ii \i ks.— Vascular. Spore-cases marginal or dorsal, one-celled, usually surrounded by an elastic 



f. Spores of but one tort. 



NATURAL Orders of Acrogens. 



il.uiMi 4. Ml'SCALRS, p. 54. 



1. IIkimtice. 



Spore-cases valveless, without operculum or) 15 RkciaceeB or Crystalworts, p. 57 



elaters J 



Bpm-cases TSlrden or bursting irregularly, I I 16 Marchantiaceai or Liverworts, p. 58 



without operculum, out with elaters . . . i 

 Rptim rtllfm opening by a definite number of) 



equal valves, without operculum, but with > 17. Jungermanniacea, or Scalemosses,p. 59 



elaters J 



Bpore-casee peltate, splitting on one side, with- 1 



out operculum, and with an elater to every > 18. Eqxiisetaceee, or Horsetails, p. 61 



spore J 



•J. efoacr. 



^;::z^Jz:^'" m ™ oper :} » ^««-. - *»—* p- ■ 



^wiThoTt'elaterr 16 .* 9 '. T. T 0petCuluin \} 20. Bryacece, or r/r»mo««, p. 64 

 Alliance 5. Lycopodalks, p. 68. 



"'n.;":;;,,^-" 11 ? 11 : axiUary . ; r< * rodu< * ive } a. i y *fc M , or mmm* P . 69 



Bpore-casee m.inv-celled, radicle (or axillary) ; ) •,.-> „ •■ r> , », 



reproductive bodies dissimilar . . . . . j 22 " «"•«««««*. ° r Pepperworts, p. 71 



ALLIANCE B> I'll.l! "ALES, p. 74. 



Spore cases ringless, distinct, 2-valved, formedl „„ r, , ■ , ajj ,m m 



a margin of a contracted leaf. . . .] 23 " Ophioglossace*, or Adders Tongues, p. W 



BP< ' "ged, dorsal or marginal, dis-) „, „ , .. r, „„ 



ti n, -t. splitting irregularly. . . . .' . . j 24 - Pdypodiaeeas, or Ferns, p. 78 



8pore-cases ringless, dorsal, connate, splitting) „- n n . M 



irregularly by a ventral cleft . ... . b p5. Danaacea, or Banteads, p. 82 



Class III. RHIZOGENS. 

 Ai.iiwi k- Tin BAVB as the Class, p. 83. 



Orules solitary, pendulous ; fruit one-seeded. 26. Balanophoracea?, or Cunomoriums, p. 89 

 Orules 00, parietal ; fruit many-seeded ; calvx) „, „ ,. „. , m 



tied ; anthers opening by slits " . j 27 ' t vtlnacea!, or Outusrapes, p. 91 

 dvui-s iOO parietal ; fruit many-seeded, calyx \ -„ „~ • „ m ■ . a „ 



b-parted, anthers opening by pores. . . .) 28, ^fflesiacea:, or Ratflrsiads, p. 93. 



Class IV. ENDOGENS. 



Alliances OF KvDOGENS. 



• Flowers glumaceous ; (thai is to lay, composed of bracts not collected in true whorls, but consisting 



of imbricated colourless or herbaceous scales). 

 7. Olohai i .-. 



* Mowers petaloid, or furnished with a true calyx or corolla, or -with botli, or absolutely naked ; 

 c? V (that is having sexes altogether in different flowers, without half-formed rudiments of the 

 absent sues being present). 



R. aUMa— Flowers naked or consisting of scales, 2 or 3 together , or numerous, and then sessile on a 

 tintpU naked spadtx ,• embryo axile ; albumen mealy or fleshy. (Some have no al- 

 bum 



«. Pa ima lw.— flowers perfect [toiOi both calyx and corolla), sessile on a branched scaly spadix; em- 

 bryo vague, solid ; albumen horny or fleshy. Some Palms are 6 ■ 



1" II vi. i! vi .::*.- -Flowers perfect or imperfect, usually seatteeed ; embryo axile, without albumen. - 



aquatics. [Some are p •) 



•.•—Flowers furnished with a true calyx ar.d corolla, adherent to the ovary ; . 

 U N ""~ V ' K ~ ';;"■■'" .v/mmww,-,,/,. ttamensSor*. or more, all perfect; seeds with albumen; 



,„ . eBromeHaceothavea 'it and corolla). 



12. Amomales.-/,,,,,,,^,,,,^,,,,.,,,,^ rt „ s , „ 6> ( <(( kast of whicharcpe(aloid; fee(lt 



''■ "" " :m " i mmetrtcal, stamens 1 to 3 ; seeds without albumen. 



