xlviii CLASSES, DIVISIONS, AND OEDEES. 
Class II. MONOCOTYLEDONES. 
Stem not separable into bark, wood, and pith ; of cellular 
tissue with vascular bundles embedded irregularly in it. 
Leaves mostly alternate and sheathing, with parallel simple 
veins connected by smaller transverse veins, rarely net-veined. 
Cotyledon one, or, if more, alternate. Floral whorls composed 
of 3 or 6 parts. 
Division 1. Dictyogen^. Leaves net-veined. Floral - 
enveloi^es whorled 392 
Division 2. Florida. Leaves parallel-veined. Floral 
envelopes whorled or wanting 393 
Division 3. Glumifee.e. Leaves parallel-veined, per- 
sistent. Floral envelopes rudimentary or wanting. 
Flowers covered by imbricate bractlike scales 446 
Division 1. DICTYOGEN^. 
80. Trilliacece. Perianth inferior. Fl. perfect 392 
81. Dioscoreaceoe. Perianth inferior. Fl. dioecious. — 
Twining plants 393 
Division 2. FLORIDiE. 
* Perianth snperiot'', j^etal-like. Sijncarpous. 
82. Hydrocharidactif. Dioecious. Fl. regular. Sep. 
herbaceous. Pet. coloured.— Floating plants 394 
83. Orchidaceca. Fl. irregular. Stam. 1—2, sessile, 
adnate to central column bearing the stigma 395 
84. Iridacece. Fl. regular, of 6 petal-like parts. 
Stam. 3, bursting outwards. Ovary 3-celled, 3-valved.... 407 
85. Amaryllidaceo'. Fl. regular, of 6 petal-like parts. 
Stam. 6, bursting inwards. Ovary 3-celled, 3-valved 410 
** Perianth inferior, apocarpous, or carpels separable 
when ripe. 
86. Aiismacea^. Perianth of 3 sepal-like and 3 petal- 
like parts. Stam. 6. Fr. of many carpels 411 
*** Perianth inferior, si/ncarjwns. 
87. Asparagaceo'. Perianth jietal-like. Stam. 6 or 4 
(ir 8 ; anth. bursting inwards. Fr. a berry.— Rhizome 
creeping 414 
