MONOCOTYLEDONS. ORCHIDEJE. Orchis. 187 



3. A. ranunculoides, leaves linear-lanceolate, fruit globose squar- 

 rose, pericarps acute, p. 1 15. Bogs and ditches, 



ORDER XIII. HYDROCHARIDE.E. Rich. 



FerianthS 6-parted, the three inner segments petalokf. Slam, 

 epigynous. Ovary jnferi or. Stigmas 3 6. Berry with on 

 or more cells. Embryo straight, in a direction contrary tj 

 that of the seed; very rarely with a dilated base. Leaves ra- 

 dical, often floating, rarely rigid and submersed. Flowers 

 white. Rich. 



1. HYDROCHARIS. 



Flowers dioecious, with the three inner segments of the perianth 

 the largest, petaloid. Barren Fl, Stam. 9, '* the three in- 

 terior filaments beaked/' Sm. 



Fertile Fl. Styles 6, each with two stigmas. Berry round- 

 ish, 6-celled, many-seeded. 



1. H. Morsus Ranee, p. 290. Ditches. 

 2. STRATIOTES. 



Spatha of two carinated leaves. Three interior segments of the 

 perianth very large, petaloid. Stam. about 20. Styles 6, 

 bifid. Berry angular, with 6 cells, many- seeded. 



1. Str. aloides, leaves ensiform triangular aculcato-serrate. p.171. 

 Ditches. 



ORDER XIV. ORCHIDE/E. Juss. Br. 



Perianth (Corolla of authors] 6-partite, with 1 segment (label- 

 lum or lip] of a different form from the others. Organs of 

 fructification united into a cnlumn. Anther 1 or rarely 2. 

 Pollen cohering in masses of a determinate figure, and usually 

 falling out of its cells. Capsule 3- or 6-valved, with nume- 

 rous minute seeds adhering to three parietal receptacles. Herbs 

 or under shrubs. Root tuberous or fibrous. Stem simple, 

 rarely divided, leafy or sheathed. Leaves simple, entire, 

 sheathing at the base. Flowers spiked, racemed, corymbose 

 or solitary, rarely paniculated. Pubescence, when it exists, 

 simple, acute, sometimes tipped with a glandular head. Br. 



(Monandrous]. 



* Anther adnate, nearly terminal, persistent. Pollen mass, composed 

 of angular granules ela&tically cohering, fixed by Us base. Br, 



1. OIICHIS. 

 Cor. ringent. Lip spurred on the underside at the base. Glands 



