101. MAESILEACEa;. 102. LYCOPODIACE^. 455 



fanshaped notched or crenate. — E. B. 318. H. F. 48. N. 137. 

 — Heiglit 3 — 6 in. Pinnae with veins radiating from the petiole, 

 sometimes deeply notched. Fronds usually solitary, hut some- 

 times two on the same stalk. — /3. B. rutaceum (Sw.) ; frond tri- 

 angular-rhomhoidal pinnatifid, pinnae 7 — 9 linear incise-seirate 

 decreasing upwards. iV. ed. 3. 332. See Milde Fil. Europ. 195. 

 —Pastures. j3. Sands of Barry, Forfar. P. V.— VH. E. S. I. 



19. OphtouIiOs'sum Linn. Adder's-tongue. 



1. O. vulffdtum (L.) ; frond ovate blunt, epidermal cells 

 flezuose, spores tubercled.— ^. B. 108. S. F. 46. N. 349. 

 — Height 4 — 12 in. erect. Spike clubshaped, usually rather 

 longer than the frond, sometimes very long. — j3. ambiguum 

 (C. & G.) ; rhizome often producing two fronds from the 

 same joining, frond oblong-lanceolate narrowed below 2 — 4 in. 

 high. — Pastures. /3. Orkney. Mr. Syme. Scilly. Mr. Towm- 

 end.—P. V. VI. E. S. I. 



[O. lusitan'icum (L.) ; frond linear-lanceolate, epidermal cells 

 straight, spores smooth. — H. F. 47. N. ed. 3. 331. S. 47. — 

 Height 1 — 2 inches, erect. — Petit Bo Bay, Guernsey. Mr. G. 

 Wohey. P. I.] 



Order CI. MAESILEACEiE. 



Creeping plants with alternate erect leaves, circinate in bud. 

 Fructification consisting of globular coriaceous axillary bodies 

 with 3 or 4 cells and containing sacs including either other 

 bodies that germinate or loose granules. 



1. PiLULABiA. Capsules solitary, nearly sessile, globose, 

 coriaceous, 2— 4-celled. Cells containing bodies of two 

 kinds — ^granules, and membranes containing minute grains. 



1. Piltoa'ku. Linn. Pillwort. 



1. P. globuKf'era (L.) ; ped. erect, caps. 4-celled. — E. B. 521. 

 H. F. 67. N. 393. — Rhizome slender, creeping, producing leaves 

 and roots at regular intervals. L. very slender, erect. Caps, 

 pubescent, slightly stalked, axillary, nearly spherical, hairy.— 

 Margins of ponds and lakes. P. VI. VH. E. S. 1. 



Order CII. LYCOPODIACE^. 



Leafy plants with simple imbricate leaves, or stemless with 

 erect subulate leaves. Fructification of aziUary sessile capsules 

 with 2 or 3 valves and no ring, including minute powdery 

 matter or spores. 



