31. CtTOTTRBITACEJE. 32. PORITTLACEJE. 133 



3. M. atternifldrum (DC. ) ; sterile fl. alternate about 6 form- 

 ing a leafless spike, spike nodding when in bud afterwards erect, 

 fertile Jl. about 3 together in axillary zvhorls at the base of the 

 spike. — -E. £. S. 2854. — L. 3 or 4in a whorl, submersed. — Ponds 

 and ditches. P. V.— VIII. E. S. I. 



2. Hipptj'ris Linn. Mare's-tail. 



1. II. vulgaris (L.) ; }. linear 6 — 12 in a whorl with a hard 

 point. — E. JB. 763. St. 44. 1. — St. simple, or sometimes branch- 

 ing at the base, erect. Fl. in the axil of each of the upper 

 leaves, often without stamens. In deep water the submersed 

 leaves are long flaccid pellucid and not hard at the end. — In 

 stagnant water a,nd slow streams. P. VI. VII. E. S. I. 



Order XXXI. CUCUEBITACE^. 



Cal. 5-toothed, tube adnate to the ovary. Cor. 5-clefl, 

 often scarcely distinguishable from the calyx, netted with veins, • 

 Stam. 5, more or less cohering. Auth. sinuous. Ovary 3 — 5- 

 celled or spuriously 1-celled ; placentas parietal. Style short. 

 Stigmas lobed. Fr. more or less succulent. Seeds flat, in an 

 aril ; embryo flat ; albumen 0. — Succulent, climbiug with extra- 

 axillary tendrils ; often monoecious or dioecious, Stip. 0. 



1. Bryoota. Cal. 5-toothed. Cor. 5-cleft. Male : Stam. 5 

 in 3 bundles. Fern. : Style 3-fid. Fruit a globose few- 

 seeded berry. Seeds oval, compressed, more or less bor- 

 dered. 



1. Beto'ma Linn. Red Bryony. 



1. B. dioi'ca (L.) ; 1. palmate 5-lobed dentate rough on both 

 sides with hard points, ft. dioecious, cal. of the fertile fl. half as 

 long as the corolla. — Sy. E. B. 517. — St. climbing. Tendrils 

 simple. Fr. red. — [-B. alba (L.) has the fertile cal. as long as 

 the cor. aud black fruit. It is said to be monoecious.]— Hedges 

 and thickets. P. V.— IX. E. 



Order XXXII. POETULACE^. 



Sep. 2, rarely 3 or 5, cohering at the- base ; imbricate in the 

 bud. Pet. usually 5, from the base of the calyx. Stam. inde- 

 finite, inserted with the petals, often opposite to the petals ; 

 filaments distinct. Ovary l-ceUed. Style 0. Stigmas several. 

 Caps, opening transversely or by 3 valves ; placenta central. 

 Embryo curved round the albumen. — Stip. scarious. 



