THE AKXTM FAMILY. 411 



6. Small Pondweed — {Potamogetoyi pimllus.) 

 Ponds and streams, not uncommon. Stretford ; Chorltou ; With- 

 ington ; Hale Moss. Fl. July. 



E. B. iii. 215. 

 Potamogeton compressus, (E. B. vi. 418.) common at Tyldesley, on Hale Moss, 

 and about Chorlton and Old Trafford, diiiers from this only in its broader leaves. 



7. Pectinated Pondweed — [Potamogeton pectindtus) 

 Abundant in the canal at Lymm, and at Worsley ; and profusely in 

 the stream that runs into Rostherne Mere, along with nutans, per- 

 foliatus, and crispus. Fl. July. 



E. B. V. 323. 



8. Zannichellia— (Zanm'cAe^Z/ff palustris.) 



Heaton Park, in one of the old pits called the Damsteads, where it 



was first gathered by Mr. John Shaw, forty years ago. Probably not 



rare. Fl. July. Annual ? 



E. B. sxv. 1844. 



CXXXIX.— THE ARUM FAMILY. Ardcew. 



A little family of plants mostly herbaceous, tropical, and poisonous, 

 and remarkable in the few species hitherto discovered, either for the 

 beauty of their foliage, or for the extremely curious conditions of their 

 inflorescence. The flowers, which are in all cases minute, are disposed 

 upon the surface or at the base of a peculiar club-like stalk called a 

 "spadix," the latter being usually enclosed, or at least while youna:, in 

 a large and peculiar leaf called a "spathe." They are unisexual and 

 monoecious, destitute of perianth, and generally very numerous. The 

 leaves, unlike those of Endogens in general, are net-veined, usually 

 hastate and petiolate, and occasionally divided in a palmate manner. 

 One species is indigenous, and belongs to the Manchester Flora, — the 

 curious plant known to country children under the name of "lords and 

 ladies." The leaves are radical, petiolate, arrow-shaped, two to five 

 inches long, pointed, very smooth and glossy, and frequently splashed 

 with purple spots. The flower, with its investing spathe, appears at 

 first in the form of a little green obelisk, four or five inches high, 

 tapering to a point at the summit, and contracted, like a waist, near 

 the base. By degrees the spathe uncurls, disclosing when quite open, 

 a beautiful crimson or purple club, about two inches long, and the 

 thickness of a quill, over which it arches like a canopy. At the base 

 of the club, which here tapers into a delicate stalk, and is concealed by 



