55i 335. Portula. 52. SALICARIiE. Pl.ejo.cal. 



Bogs and damp heaths ; annual ; July and August. 

 Stem prostrate, simple; leaves opposite, blunt, bald; 

 Jiowers sessile. 



Fam. XVIII. 53. TAMARICIN^. Tamarlscine(E, 



Desvaux. 

 Calyx free, divided at the tip, persistent ; petals 5, on 

 the calyx, alternating with the calyx-lobes; stamens 5 to 

 10, free or monadelphious; ovary free, 1-celled, 3-valved ; 

 placentarium parietal ; ovules many, erect or ascending ; 

 seeds many, comose; perisperm 0; corculum straight, up- 

 right; radicle below. 



336. TAMARIX. Pliny. Tamarisk. 

 Calyx 5-parted; petals 5; stamens 5; /ila?nents thread- 

 shape, distinct ; style short, 3-lobed ; stigmata 3, oblique, 

 2-furroWed ; ovules upright. — Leaves imbricate, rather 

 fleshy ; Jiowers spiked, lateral, bracteated ; hractece lanceo- 

 late. 



Tamarix Gallica. French tamarisk. 



Leaves lanceolate, embracing the stem, imbricate. 



Tamariscus Narbonensis, Ger. em. 1378, 1. 

 Taraariscus folio tenuiore, Parfc. 1479; description. 

 Myrica seu Tamariscus, Park. 1472, 1 ; figure. 



Rocks and pastures near the sea ; shrubby ; July. 

 Twigs drooping, red, shining ; leaves smooth ; Jiowers 

 flesh-coloured. 



Fam. XIX. 54. CERATOPHYLL^. 



Flowers unisexual; calyx many-parted, free; corolla 0. 

 — Male. Stamens 14 to 20; anthers 3-cuspidate. — Fem. 

 Ovary free, compressed, 1 -celled; stigma sessile, oblique; 

 nut 1 -celled, 1 -seeded, leatherlike; seed pendulous; peri- 

 sperm ; corculum straight ; cotyledons 4, 2 larger, op- 

 posite; radicle above; plumula conspicuous, very compound. 

 — Plant herbaceous, aquatic ; leaves in whirls, lobed ; 

 Jiowers axillary, solitary. 



337. CERATOPHYLLUM. Linnaeus. Hornwort, 

 No other genus in this family. 



1. Ceratophyllum cornutum. Horned hornwort. 



Leaves two-forked, two-paired ; fruits 3-spined. 



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