334 K e y t° th e Orders, Genera, &c. 



Fl.solitary,bisexual, stam. i or 2, aquatic 



herb PODOSTEMON, iii. 416. 



Fl. solitary, unisexual, stam. 1, aquatic 



herb CALLITRICHE, ii. 149. 



Fl. minute spicate. 



Fl. bisexual, styles 2-4 . . . CIX. PlPERACE^E, iii. 209. 



Fl. binate, a male and a fern, connate ex. ChloranthacE/E, iii. 432. 



Perianth o in fem. fl. only of the following genera : — 



HALORAGE^E; Serpicula, ii. 147; Myriophyllum, ii. 148. 



Composite; Xanthium, iii. 35. 



Balanophorace^e, iii. 476. 



Urticace^E ; Ficus, iv. 83 ; Antiaris, iv. 96 ; obscure in Dorstenia, iv. 10. 



Class II.— GYMNOSPERMS. 

 cxxiii. Cycade^e, L. iv. 121. 



Class III.— MONOCOTYLEDONS. 



Series I. — Petaloid. Perianth usually double, of 6 segments 

 in ^wo rows, rarely single. 



A. Perianth superior. 



Submerged herbs, fresh water 



and marine . . . CXXIV. Hydrocharide^E, iv. 122. 

 Terrestrial herbs. 

 Stam. 6. 

 Fl. regular. 

 L. undivided. 



Anth. with the connective appendaged. 



Cells of ov. many-ovuled exxv. Burmanniace^e, iv. 129. 

 Cells of ov. 2-ovuled . Trichopus, iv. 279. 



Anth. with connective not appendaged. 



Cells of ov. 2-ovuled . cxxvni. H^emodorace^e, iv. 266. 

 Cells of ov. many-ovuled exxix. Amaryllide^e, iv. 268. 

 L. tripartite, segments laciniate CXXX. Taccace^, iv. 273. 



Stam. 2 Apostasia, iv. 238. 



Fl. irregular. 



Stam. adnate to the style . cxxvi. Orchide^e, iv. 132. 

 Stam free from the style . cxxvu. Scitamine^e, iv. 238. 



B. Perianth inferior. 



Fl. very minute in dense invo- 



lucrate heads . . . clxvii. Eriocaulone^e, v. i . 

 Fl. on a spadix. 



Spadix at first enclosed in one or more spathes. 

 Spadix branched, shrubs 



or trees . . . exxxix. Palmes, iv. 319. 

 Spadix simple, perianth single. 

 Spathe open. 



Herbs, fl. unisexual . Orontie^E. iv. 344. 



Climbing shrub, fl. bisexual POTHOS, iv. 363. 



Spathe calyptriform, ca- 

 ducous, aquatics . Aponogeton, iv. 372. 

 Spathe o, or very imperfect, aquatics. 



