16 



SHORT NOTES AND qUEKIES. 



Ci/sfosipJion pyfhmcles. Any one who lias kept. Wolffiu may have found 

 after a while that many of the fronds become soft, dull, transparent, and 

 of a pale yellow, and sink to the bottom of the water. It was such plants 

 that were found to be affected by the CijHtoslplion. The mycelium of the 

 parasite penetrates the cellular substance of the frond, and the methods of 

 its reproduction are carefully described and figured. There are two 

 modes ; in the asexual mode, which resembles that of FyfMum ento- 

 pliytum, described by Pringsheim in his ' Jahrbiicher,' vol. i. p. 289 and 

 t. 21, zoosporangia are formed in the peripheral cells of the frond, the 

 outer wall of which is ultimately perforated by a slender tube emitted 

 from them ; the extremity of the tube having reached the outer surface of 

 the frond becomes enlarged and forms a vesicle, into which passes the 

 fluid contents of the zoosporangium. This soon divides into several por- 

 tions, each of which becomes a ciliated zoospore. On the rupture of the 

 membrane of the mother-cell these escape into the surrounding water, and 

 after active motion for twenty to fifty minutes settle down on the surface 

 of other fronds of WolJJia, become spherical, acquire a cell-wall, lose their 

 cilia, and germinate by sending out a mycelium, which penetrates the cell- 

 walls of the host-plant. Sexual reproduction is effected by oogonia and 

 antheridia, the contents of which mingle, and that of the oogonium con- 

 tracts into an oval mass (oospore), which soon becomes covered with a 

 thick rugose covering. Its further history has not been traced. 



PoTAMOGETON zosTERiFOLius, ScJimn., AT OxFORD. — I have sccn spe- 

 cimens of this rare Pondweed, the P. compressus, L., of Pries, Koch, and 

 the 'Student's Flora,' but not of Linnseus's herbarium, collected in July, 

 1870, by Professor M. A. Lawson in the Isis, near Oxford. Though the 

 county of Oxford (or Berks) may be considered as hitherto unrecorded 

 for the plant, not being admitted into any of Mr. Watson's summaries, 

 yet, from the references, there is reason to think that by the P. gramineum 

 of Silithorp's ' Flora Oxoniensis ' (p. 66) this species was intended. Few 

 localities are on record in England for this easily-recognized and hand- 

 some species. It is likely to occur in other parts of the Thames water- 

 system. — Henry Trim en. 



Flora of Newfoundland. — During an ornithological trip to New- 

 foundland, from August, 1866, to August, 1868, I compiled a list of 372 

 species of Flowering-plants and Ferns in the island. Of these, the fol- 

 lowing are not included in Sir W. J. Hooker's ' Flora Boreali-Americana ' 

 (1840). The nomenclature is that of Professor A. Wood's 'Class-book 

 of Botany,' New York, 1866. 



Anemone narcissiflora. 



Thalictrum alpinum. 



Actsea 8j)icata. 



Alsine grcenlandica. 



Paronychia canadensis. 



Scleranthus annuus. 



Archangelica peregriiia. 



Caucus Carota (intro- 

 duced). 



Viburnum Opulus. 



V. pauoiflorum. 



Centaurea Cyauus (intro- 

 duced). 



Calluna vulgaris, Capeliu 

 Bay, 47° N. lat., 53° 



— Henry Reeks. 



W. long, (see Journ. 



of Bot. II. 55, 154; 



111.29,121; IV. 305.) 

 Utricularia minor. 

 Betula nigra. 

 Pinus mitis. 

 Typba angustifolia. 

 Zostera marina. 

 Cypripedium candidum. 

 Spirauthes latifolia. 

 Juncus debilis. 

 J. acuininatus. 

 J. Conradi. 

 Eleoeharis tenuis. 

 Cladium mariscoides. 



Carex formosa. 

 C. comosa. 

 Agrostis scabra. 

 Panicum dichotomum. 

 P. lanuginosum. 

 Bromus ciliatus. 

 Poa trivialis. 

 Glyceria maritima. 

 Briza media (introduced). 

 Lolium perenne (intro- 

 duced). 

 Spartina juncea. 

 S. alterniflora. 

 Osniunda regalis. 

 O. Claytoniana. 



