He Co bo ee 
or 
cob = 
wh = 
TABLE OF GENERA. xlv 
- Parrerarta. Flowers in axillary clusters, surrounded by an involucrum, 
. Humutvus. A climber. Diccious. Fertile flowers in an oval catkin. 
Order LXXX. ULMACEA. 
. Utmus. The only British genus. 
Order LXXXI. ELEAGNACEA. 
. HterorpnaAé. The only British genus. 
Order LAX XIT. MYRICACEA. 
. Myrica. The only British genus. 
Order LXXXIII. BETULACEA. 
. Beruna. Stamens 8-12. 
. Aunus. Stamens 4. 
Order LXXXIV. SALICACE/. 
. Satrx. Scales of catkins entire. Stamens 1-5. 
. Porutus. Scales jagged. Stamens 4-30, 
Order LXXXYV. CUPULIFERA. 
. Facus. Barren flowers in a globular catkin. Fertile flowers within a prickly 
involucrum. Stigmas 3. 
. CastannA. Barren flowers in a cylindrical catkin. Fertile flowers in a 4-lobed 
involucrum. Stigmas 6. 
. Quercus. Barren catkin lax, long. Nut surrounded by the cup-like involucrum. 
. Corytus. Barren catkin long, cylindrical. Nut covered by a coriaceous in- 
volucrum. 
. Carrinvs. Barren catkin long, lax. Involucrum of 2 leaf-like scales. 
Order LXXXVI. CONIFERA. 
. Pinus. A tree. Fertile flowers in a cone. 
. Juniperus. A bush. Fruit berry-like. 
. Taxus. A tree. Seed enveloped in a cup-like fleshy receptacle. 
Order LXXXVII. DIOSCOREACE“:. 
. Tamus. The only British genus. 
Order LXXXVIII. TRILLIACEAL. 
. Paris. The only British genus. 
Order LXXXIX. HYDROCHARIDACEA:. 
. Anwaciarts. Leaves whorled. Plant submersed. 
. Hyprocuaris. Leaves floating, kidney-shaped. 
_ Srratiotes. Leaves submerged, sword-shaped, with marginal prickles. 
~ Order XC. ORCHIDACEAE, 
* Anther cohering to the face of the stigma. 
. Orcnis. Lip with a spur, Glands of the stalks of the pollen-masses ina pouch. 
