76 MEDICAL BOTANY. 



Order 102. — Cycadace^e. — Stem simple, continuous. Leaves parallel- 

 veined, pinnate. Scales of the cone antheriferous. 



Order 103. — Pinace^:. — Stem repeatedly branched, continuous. Leaves 

 simple, acerose. Females in cones. 



Class III.— Endogcns or Monocotyledonous Plants. 



Stem without distinct bark or pith ; the wood .formed of bundles of fibres 

 and vessels, irregularly dispersed through a cellular tissue ; the rind closely 

 adherent ; no medullary rays or concentric layers ; increase in size by the 

 deposition of new fibrous bundles in the central part of the stem, within the 

 old. Leaves seldom articulated, usually sheathing at base, with simple 

 parallel veins. Embryo with a single cotyledon, or if a second be present, 

 it is much smaller than the other. 



Group XLII. — Palmales. 



Flowers on a branched, scaly spadix, with a double perianth. Ovary 3- 

 celled, with a single ovule in each cell. Embryo minute, below the surface 

 of a horny or fleshy albumen. 



Order 104. — Palmacete. — Unisexual. Flowers perfect. Fruit a drupe 

 or berry. 



Group XLIII. — Arales. 



Flowers on a spadix, with a simple or scale-like perianth, or wholly want- 

 ing. Embryo in the axis of a mealy or fleshy albumen. 



Order 105. — Arace^e. — Flowers indefinite, naked, on a solitary spadix, 

 with a single-hooded spathe. Anthers sessile. Seed loose. Embryo slit, 

 axile. 



Group XLIV.— -Alismales. 



Flowers not spadiceous, hypogynous, bisexual, with a double perianth. 

 Ovaries several, distinct or united. Seeds exalbuminous. 



Order 106. — Alismace.e. — Flowers tri-petaloid. Placenta? simple, axile, 

 or basal. Few-seeded. Embryo solid. 



Group XLV. — Juncales. 



Flowers hypogynous, bisexual, herbaceous flowered, hexapetaloid, with an 

 abundant albumen. 



Order 107. — Orontiace.e. — Flowers on spadix. Embryo axile, with a 

 cleft on one side. 



Group XLVI. — Narcissales. 



Flowers with a regular perianth. Ovary 3-celled, many-ovuled. Stamens 

 3 or 6. Seeds albuminous. 



Order 108. — H.emodoraceve. — Flowers hexapetalous, tubular, scarcely 

 imbricated. Stamens 3 or 6 ; anthers turned inwards. Radicle remote from 

 the naked hilum. 



Order 109. — Iridace,e. — Flowers hexapetalous. Stamens 3. Anthers 

 turned outwards. 



Group XLVII. — Amomales. 



Flowers with an irregular perianth. Ovary 3-celled. Stamens 1 — 6, some 

 of which are abortive. Seeds albuminous. 



