^* 



XXXVl 



LINNiEAN METHOD. 



Class XXI. MONCECIA.* Stamens and pistils in separate flowers 



on the same plant* 



Ord. I. MoNANDKiA. 1 stamen, 



1. Euphorbia. Involucre of 1 piece, including several barren 

 flowers and 1 fertile. Perianth none, or a very minute one 

 to the fertile flower. Germen 3-lobed. Styles 3, cleft. Caps. 

 3-seeded. p. 376. 



2. Callitriohe. Bracteas 2 or none. Perianth none. Germen 



solitary, 4-lobcd, indehiscent, with 4, 1-seeded cells. Styles 

 2, simple, p. 381. 



3. Zannichellia. Involucre, spatha, and spadix none. Perianth 



of barren^fl. none; of fertile single, of 1 leaf. Germens 4 or 

 more, each with 1 undivided style, p. 486. 



4. ZosTERA. Perianth none. Stamens and pistils inserted alter- 



nately in 2 rows upon one side of a thin flat spadix inclosed 

 within a foliaceous spatha. Anthers sessile. Style bifid. 



Fruit dry. p. 486. 



5. Aeum. Perianth none. Stamens inserted about the middle, 



pistils on the lower part of a thick rounded spadix which is 

 enveloped by a spatha convolute at the base. Pruit fleshy, 

 many-seeded, p. 475. 



Ord. II. DiANDRiA. 2 stamens. 



6. Callitriche. Plowers solitary. Fruit naked, 4-lobed, 4-seeded. 



Styles 2, simple. — Leaves opposite, sessile, p. 381. 



7. Lemna. Spadix 0. Spatha urceolate, membranaceous, inclosing 



one barren and one fertile flower. Ovary 4- celled. Style and 

 stigma 1. — Minute floating, frondose plants, p. 477. 



8. Carex. Flowers in spikes. Fruit 1-seeded, contained within 



an urceolate membranaceous perigynium. Style 1, with 2 — 3 

 stigmas. — Leaves alternate, sheathing, p. 499. 



Ord. III. Tkiandria. 3 stamens. 



9- CYPERACE^. Flowers in spikes, subtended by glumes. 



Achenes with 1 style and 2 — 3 stigmas. — Leaves parallel- 

 veined, p. 488. 



10. TYPHACEiE. Flowers in spikes or capitate, 



wi 



Pericarps in dehiscent, with 1 style and stigma. 

 rallel- veined, p. 473. 



Leaves pa 



11. 



r 



Amaranthus. Perianth single, deeply 3 -partite. Styles 2—3. 

 Utricle of 1 cell, bursting , all round transversely, 1-seeded. 

 — Leaves netted-veined. p. 352. 



Ord. IV. Tetrandria. 4 stamens. 

 12. Lixtorella. Barren fl. : Cal. 4-leaved. Cor. 4-fid, scarious. 



i: 



1 



From f^ovoff one, and oi;cof, a house. 



