XXV1U 
ANALYTICAL KEY. 
2. Both sterile and fertile flowers in catkins or catkin-like heads. 
Ovary and pod 2-celled, many seeded. 
Liquidambar in Hamamelide^e, 23 
Ovary and pod 1 -celled, many seeded; seeds furnished with a 
downy tuft on one end Salicace.e, 84 
Ovary 1-2-celled, only one ovule in each cell; fruit 1-seeded. 
Parasitic on trees ; fruit a berry. . . . Lorantiiace^:, 76 
Trees or shrubs not parasitic. 
Calyx regular, in the fertile flower, succulent in fruit. 
UrticacevE, 79 
Calyx none, or rudimentary and scale-like. 
Style and stigma one, simple ; the flowers in heads. 
Platanace^e. 
Styles or long stigmas 2. 
Fertile flowers 2 or 3 at each scale of the catkin. 
CUPULIFERA3, 82 
Subclass II. GYMNOSPERMiE. Pistil an open scale or altered 
leaf, bearing naked ovules on its margin or its upper surface. 
CONIFERiE, 85 
Class II. MONOCOTYLEDONOUS PLANTS. 
Stems without central pith or annual layers, hut having the woody fibres 
distributed irregularly through them (a transverse slice showing the fibres 
as dots scattered through the cellular tissue). Embryo with a single coty- 
ledon and the early leaves always alternate. Parts of the flower usually 
in threes (never in fives), and the leaves mostly parallel-veined. All her- 
baceous except Smilax. 
A. Spadiceous Division. Flowers aggregated on a spadix or fleshy 
axis, or sometimes scattered, destitute of calyx or corolla ( excepting 
some Aracece and Fajadacece, where , however , they are on a spadix), 
and also without glumes ( husky scales). Leaves sometimes with netted 
veins. 
Little floating aquatics, with no distinction of stem and foliage. 
• Lemnace^e. 
Immersed aquatics, branching and leafy. . . Najadace^e. 
Reed- like or flag-like marsh herbs with linear and sessile 
nerved leaves ; flowers in spikes or heads. 
