MONOCOTYLEDONES — PETALOIDE^. 425 



Div. II. Ovary adnate with the tube of the perianth. 



Ord. XCIII. HYDROCHARIDE^. Limb of \X\q peri- 

 anth 3 — G-parted, the 3 inner segments petaloid. Stamens epigy- 

 nous. Ovary \. Stigmas 3, 1 or 6. Berry with one or more 

 cells. Embryo straight, in a direction contrary to that of the 

 seed, very rarely with a dilated base. — Aquatics. Leaves radi- 

 cal, often floating, rarely rigid and submerged. Flowers white. 

 — 1. Hydrocharis, />. 352. 2. Stratiotes, p. 210. 



XCIV. ORCHIDEiE. Peria?ith of 6 segments in 2 rows, 

 mostly coloured ; one, the lowest one (so situated from the 

 twisting of the ovary) diiferent in form from the rest and often 

 spurred. Stamens 3, united in a central column, the two lateral 

 ones usually abortive, sometimes the central one. Anther often 

 deciduous, 2 — 4 — 8-celled. Pollen powdery or frequently co- 

 hering in waxy masses. Ovary 1-celled, with 3 parietal recep- 

 tacles. Style forming part of the column with the stamens. 

 Stigma a viscid space in front of the column. Capsule (rarely 

 a berry'), 3-valved. Seeds numerous, testa loose, reticulated. 

 Albumen 0. — Herbaceous plants, frequently, in the terrestrial spe- 

 cies, with tuberous roots. Many tropical species are epiphytes. 

 Flowers generally hatidsome, in spikes or racemes. — The Tubers 

 of many species afford Salep. The fragrant Vanilla is the 

 seed-vessel of Vanilla aromatica. — Professor Lindley thus ar- 

 ranges the British Genera : 

 * Pollen simjile or consisting of granules in a lax state of cohesion. 



Tribe I. NEOTTIE^, 1. Goodvera.^ 2. Neottia. 3. Lis- 

 TERA. — Tribe II. ARETHUSEiE. 4. Epipactus. 5. COR- 



ALLORHIZA. \ 



** Pollen cohering in granides, which finally become waxy and 

 are indefinite in number. 



Tribe III. OPHRYDEiE. 6. Orchis. 7. Gymnadenia. 8. 

 Habenaria. 9. Aceras. 10. Herminium. II. Ophrys. 



«** Pollen cohering in grains, which finally become waxy and 



are definite in number. 



Tribe IV. MALAXIDE^. 12. Malaxis. 13. Liparis. 



**** Lateral anthers fertile, the middle one sterile and petaloid. 

 Tribe VIII. CYPRIPEDIE^. 14. Cypripedium. ^ 



All the above Genera will be found at p. 311. 



(SciTAMiNETE. Aromatic, herbaceous, tropical Plants. The roots and 

 seeds are employed as condiments, and in the Materia Medica. Car- 

 damoms are the produce of Amomum, Ginger of Zinziber, Zedoary of 

 Curcuma, Turmeric o? Kcempferia.) 



(Marantace.e. Maranta aruadinacea yields Arrow-root.) 



(MusACE^. The Banana and Plantain Family.) 



