584 



SYSTEMATIC BOTANY. 



2. Hypostamineae. 



Natural Order 135. Brunoniaceje. — The Brunonia Order. — 

 Herbaceous plants. Leaves entire, radical, exstipulate. Floivers 

 in heads, surrounded by an involucre. Calyx inferior, 5-parted. 

 Coro//a 5-parted, withering. -S^awjen* few, hypogy nous; anthers 

 slightly coherent. Ovary superior, 1 -celled ; ovule solitary, erect ; 

 style single ; stigma surrounded by an indusium. Fruit enclosed 

 in the hardened calyx. Seed erect, solitary, without albumen. 



Distribution, Sfc. — Natives of Austraha. Example: — Bru- 

 nonia. This is the only genus, of which there are 2 species. 

 Properties and Uses. — Unknown. 



Natural Order 136. Ericace^. — The Heath Order. — 

 Shnibby plants. Leaves entire, evergreen, opposite or whorled, 



exstipulate. Calyx 4 — 5-cleft, 

 Fig. 9Q3. inferior, persistent. Corolla hy- 

 pogynous, monopetalous ifigs. 

 469 and 962), 4— 5-cleft; cesti- 

 vation imbricated. Stamens hy- 

 pogynous (^figs. 962 and 963), 

 as many, or twice as many as 

 the divisions of the corolla ? 

 anthers 2-celled, opening by a 

 pore (Jig. 520, r), appendiculate 

 (/^s. 520, a, 962 and 963). Ovary 

 many- celled, with numerous 

 ovules, surrounded by a disk or 

 scales; style 1 ifigs. 962 and 

 963), Fruit capsular, or rarely 

 baccate; placenta axile. Seeds 

 numerous, small, anatropous ; - 

 embryo in the axis of fleshy 

 albumen. 



Division of the Order, Sfc. — 

 Lindley has two sub-orders as 

 follows : — 



Sub-order 1. Ericece. — Fruit loculicidal, or rarely septicidal, 

 or berried. Buds naked. Examples : — Erica, Calluna, Gualtheria, 

 Arbutus. 



Sub-order 2. Rhododendrece. — Fruit capsular, septicidal. 

 Buds scaly, resembling cones. Examples: — Azalea, Kalmia, 

 Khododendron, Ledum. 



Distribution, Sfc. — They are very abundant at the Cape of 

 Good Hope, and arc also more or less generally diffused in 

 Europe, North and South America, and Asia. There are 42 

 genera, and about 850 species. 



Properties and Uses. — The plants of this order are chiefly re- 



Fig. 962. Vertical section of the 

 flower of a species of Heath (Eri- 

 ca) Fig. 963. Essential organs 



of the same. The stamens are 

 seen to be hypogynous. 



