272 MONCEC. PENTAND. POLY AND. 



4. PENTANDRIA. 



11. BRYONIA. 



1. Br. dioica (red-berried Brio?iy} 9 leaves palmate rough on both 

 sides, flowers dioecious. Lig/ilf. p. 590 ( Bryotiia alba} . E. B. 

 t. 439. 



HAB. Sometimes seen in garden hedges and near houses, but proba- 

 bly not indig., Dr. Burgess. Fl. May. I/ . 



Root exceedingly large, white and branched. Stem long, slender, 

 branched, weak, and climbing, with simple tendrils. Leaves large, 

 5-lobed, the lobes angular. Flowers in axillary bunches. Cor. 

 whitish, with green veins .Berries red. Full of a fetid, acrid juice. 



5. POLYANDRIA. 



12. CERATOPHYLLUM. 



1. C. demersum (common Hornwort), fruit armed with three 

 spines. Lig/itf. p. 580. E. B. t. 947. 



HAB. Under water in slow streams and ditches, common. Fl. July. I/ . 



Stem long, slender, and much branched. Leaves whorled, di-tricho- 

 tomous, linear, setaceous, distantly serrated. Flowers whorled, in 

 the axils of the leaves, small. Anthers sessile, crowded, spotted. 

 Germen with 3 unequal spines longer than the cal., and terminated 

 by a more or less curved, subulate style. Are the spines upon the 

 fruit of this plant sufficient to form a specific distinction between 

 this and C. submersum ? 



13. MYRIOPHYLLUM. 



1. M. spicatum (spiked Water Mill/oil), sterile flowers in in- 

 terrupted leafless spiked whorls. Lightf.p.581. E.B.t.SS. 



HAB. Ditches and stagnant waters, common. JF7. July, Aug. I/ . 



Stems slender, much branched. Leaves 4 together in a whorl, finely 

 pectinated, and always under water. Spikes slender, 2 3 inches 

 long. Petals small, reddish. Anthers yellowish. 



14. ARUM. 



1. A. maculatum (Cuckow-pmt, or Wake-robin}^ leaves all ra- 

 dical hastato-sagittate, lobes deflexed, spadix club-shaped ob- 

 tuse shorter than the spatha. Light/, p. 528. E. B. t. 1298. 



HAB. Hedges and shady places, but not frequent. Woods at Both- 

 well and Hamilton, Hopk. Woods at Dalhousie, abundant, and 

 Bogsmill, near Slateford, Maugh. Cliesh woods, Mr. Arnott. Upon 

 Inchmahone, Loch of Monteith, Mr. Young. Fl. April. 11 . 



Roots tuberous, affording an abundant feculum, which, if properly 

 prepared, for it is of a poisonous nature, proves an excellent siicce- 

 daneum for bread-flour, and is sold for that purpose in great abun- 

 dance at Weymouth and in the Portland Island. Leaves large, 

 shining, often spotted with black. Spatha more or less convolute, 

 large. The germens are at the base of the spadix : above is a ring 

 of 2-celled sessile anthers, and above these another ring of appa- 

 rently abortive germens. The spadix is long, club-shaped, and of 



