Pillul aria. ^ 
FERNS. 
G7 
Watson. Near Warrington, Lancashire, Mr. IF. Wilson. Near Braunston, 
Leicestershire, Rev. A. Bloxam. Heanor, Derbyshire, and Colwick, Notts, Dr. 
Horvitt, Pottery Car, Mr. S. Appleby. Near Bristol, Miss Worsley. Somerset, 
Mr. A. Southby. Norfolk, Miss Bell. At the side of the pond, in Wike Farm, 
Sion Lane, Isleworth ; near the ladder stile, Osterley Park, near Brentford, 
Middlesex; and 4 miles south of Dorking (abundant), Mr.J.Bevis. Various 
parts of Surrey, Kent, Herts, and Hants, Mr. W. Pamplin. Meadows of Long 
Leet, Wiltshire, Mr. Rowden. Sussex, Mr. H. C. Watson. Near Slateford, Near 
Barnstaple, Devon, Mr. J. Nash — Wal. : Near Wrexham, Mr. J. E. Bowman. 
— Ire. : Lawn of the Observatory, Dunsink, Mr. Kelly. Not unfrequent in 
Ireland, Mr. Mac/cay. 
Geo. — Throughout Europe, and from New York to Pennsylvania in North 
America. 
PILULARIA.— PILL-WORT. 
(From Pilula, a little pil; from the shape of its seed-vessels.) 
A, frond of Pilularia globulifera magnified, showing the vernation, rldzoma , 
and roots in different states. B, cross section of the root. C, of the seed vessel. 
D, one quarter of ditto still further magnified, showing the spores and bags of 
granules. E, spore and abortive granules, the latter burst open. F, spore. G, 
point of ditto in germination. H, front view of the end of ditto in germination. 
I and J, germination still further advanced. K, cuticle of the stem. L, mem- 
brane which divides the root into various cells. M, hair from an involucrum ; a, 
its point of attachment. The germination taking place from a determinate 
point, shores that the word spore is as relative to the Pilularia a misnomer, and 
that the reproductive grains are real seeds. These figures are taken from Mr. 
Valentine’s paper mentioned in the Introduction. 
PILULARIA GLOBULIFERA. 
CREEPING PILL-WORT. PEPPER-GRASS. 
(Plate 4, fig. 10.) 
Cha. — Leaves filiform. Stem creeping. Receptacles coriaceous, 
hairy, nearly radical. 
Syn. — P ilularia globulifera of all botanists. 
Fig. — E. B. 521. — Bolt. 40. — Flo. Dan. 223. — Hook, in Flo. Lon. 83. 
Des. — Stem very long, cylindrical, and creeping close to the 
ground, throwing off at intervals of half an inch or more several 
