Typlia.'\ MONOECIA — TRIANDRIA. 321 



GYNANDRIA— HEXANDRIA. 



15. Akistolochia. Linn. Birthwort. 



1. k.*Clematitis, L. {common Birthwort); stem erect, leaves 

 heart-shaped, flowers upright, lip oblong shortly acuminate. 

 E. Bat. t. 398. 



Copses and pastures, and especially among old ruins in the E. and S. 

 of England. Fl. July, Aug. %.— Flowers pale yellow. 



CLASS XXL MONOECIA. Stamens and Pistils in 

 separate flowers on the same plant. 



ORD I. MONANDRIA. 1 Stamen. 



1. Euphorbia. Involucre of one piece, including several bar- 

 ren flowers and 1 fertile. — Barr.fl. A single stamen without 

 calyx or corolla. — Fert.fl. A single pistil without calyx (or 

 rarely a very minute one) or corolla. — Germen 3-lobed. Styles 

 3, cleft. Caps. 3-seeded. — Nat. Ord. EuphorbiacEjE, Juss. — 

 Named from Eupliorbus, Physician to Juba, king of Maurita- 

 nia, who brought the plant into use. 



2. Callitriche. Barren fl. Perianth single, of 2 leaves 



(they are, rather, 2 bracteas) or none. Anther of 1 cell Fert. 



fl, Germen 4-lobed, lobes laterally compressed, indehiscent, 



with 4, I-seeded cells. — Nat. Ord. Halorage^, i?r Name — 



■/.aXo;, beautiful, and &p^, hair. Its stems are long and slender, 

 and resemble hairs. 



3. Zannichellia. Barren fl. Perianth none. — Fert.fl. Peri- 

 anth single, of 1 leaf. Germe7is 4^ ov more. Sft/le I. Stigma pel- 

 tate. Capsides nearly sessile. — Nat. Ord. Naiades, J2iss. — 

 Named in honour o^ John Jeionie Zatmichelli, a Venetian apothe- 

 cary and botanist. 



4. ZosTERA. Stamens and pistils inserted in 2 rows upon one 

 side of a spadix. Spatha foliaceous. Anthers ovate, sessile, 

 alternating with the germens. Germen ovate. Sti/leh'\G.d. Fruit 

 with 1 seed, (bursting vertically, Wilson). — Nat. Ord. Naiades, 

 Juss. — Named from ^ugTr,o, a girdle, or ribboyi, which the leaves 

 somewhat resemble. 



(For Chara, see Cl. Cryptogamia.) 



ORD. II. DIANDRIA. 2 Stamens. 

 (See Callitriche in Ord. I. Carex in Ord. III.) 



ORD. III. TRIANDRIA. 3 Stamens. 



5. Typha. Flowers collected into very dense, cylindrical 

 spikes or catkins. — Barren fl. Perianth 0. Stam. 3 together 



VOL. I. y 



