Be x05 QA] 35952 JOURNAL OF BOTANY, BRITISH AND FOREIGN. Editen by JAMES BRITTEN, F.L.S., SENIOR ASSISTANT, DEPARTMENT OF BoTANY, BRITISH Museum (Natural History), SoutH KENSINGTON, ILLUSTRATED WITH PLATES AND WOODCUTS. Mo. Bot. Garden, 1894 LONDON: WEST, NEWMAN & CO., 54, HATTON GARDEN. 1893. WEST, NEWMAN AND CO., PRINTERS, HATTON GARDEN, E.C. CONTRIBUTORS TO THE PRESENT VOLUME, E. G. Baxer, F.L.S. KE. F. Linton, M.A. J. G. Baxer, F.R.S. W. R. Lin ton, M.A. Erne. 8. Barr A. EK. Lomax. . H. Beppome, F.L.S E. D. Marquanp W. H. Beesy, F.L.S E. 8S. Marsaatz, M.A., F.L.S. Joun Bensow, F.L.S. M. T. Masters, M.D., F.R.S Aurrep W. Bennerr, D.Sc., | J. C. Mervin, M.A., F.L.S. F.L.S. | W. Mirren, ci Artuur Bennett, F.L.S. S. re M. Moore, B. Se., F.L.8. R. pr G. Benson. A. G. Mors, F.L.S. G. S. Bouncer, F.L.S. Baron F. von Ligier JAMES Barrran. F.L.§S. G. R. M. ae ye ve. S J. H. Burxru. G, A. Sewn S.d. J. B. Carrutuers, F.L.S. W. H. Pearso: CARRUTHERS, F. B.S. C. H. 8. Percevan C. B. Cranks, M.A., F.R.S Lister Perry. FP, V. Puuurrs, F.L.58 RYER. Antony Gepp, M.A., F.L.8. R. J. Harvey Gisson, M.A., F.L. Henry Gnovas, F.L. 8. Orre Kuntze, Ph a H. C. Leviner, M.A. Aveustin Ley, M.A. Witi1uM iblects ai, 8. O. STLER. J. W. ‘Noaea: F.L.S. Fr. N, Wiitams, F.L.S. Directions to Binder. Tags. 830, 33 : 3 “ : to face page 1 . 33 a ‘9 nw $OBrcox, wie » 884 3 ‘ , ae Oe. begs il cat eS i 408 Tae eM a res Or all may be placed together at the end of the volume. eh _ SUBSCRIPTIONS FOR 1893 ARE NOW DUE. JANUARY, 1893. Vol. XXXI. JOURNAL OF BOTA BRITISH AND FOREIGN. EDITED BY JAMES BRITTEN, ro 2 SN ae ‘Yr. ? mers Tr SENIOR ASSISTANT Souta KENSINGTON. CONTENTS. ee ae syste ke Re ev. oh Sain L “ M. Deg A Contti bation ie our Knowled ee Further Noteson eine, new e __ of Seedlings. By the Right'Hon. 13 riggs L CRBOCE, Mores SEP kas in POs ae e 7? Hook Notes, News, ie a J NOLICE. _ The JOURNAL OF BOTANY is printed and published _ by West, Newman & Co., 54, Hatton Garden, London, E.C., to whom Subscriptions for 1893 (in advance, Twelve Shillings ; if not paid in advance, chargeable at the rate of 1s. 3d. per aumber) te oe se ime Postal Orders ater = not be crossed. S aEEEEEEaEnEmeameeremel ——————— - ams to be ical to Toms Barrrex, Est, eat qu: are, Southwark, S.E. ee tia will” be greatly obliged to the delisienes of Losi - Natural History Societies if-they will forward him copies of their Transactions, so that any paper of botanical interest may be peri) in this Journal. venus oo ADVERTISEMENTS, age . - Quarter page a their articles are nee . 7 and to sens Leases S.; 0 otherwise th Pp. West, Newman im Seemanni. A Rr Cyeas > 4 . zo 9; R.Morgan del ad phot, THE JOURNMEO OFT BOTAR?T BRITISH AND FOREIGN. ON CYCAS TAIWANIANA, sp. Nov., AND C. SEEMANNI A.Br. By W. Carrutsers, F.R.S. (Puates 330, 881). Tue characters employed in grouping t the different species of the genus Cycas are 1 ot altogether et, No doubt this is being the revolute mar, or the more or less flat nature of the segments. But t he fact a in the most characteristic revolute species (C. revoluta L.) there are plants with flat margins shows (C. Beddomei Dyer) | has its affinities with the C. circinalis and the Australian species, and not with C. revoluta or C.inermis. Neither can this depends in several species on the age of the spa ix. i dt appears to me, looking at the materials existing in the Herbarium of the British Museum, and at the published figures and descrip- tions, that the form of the barren expansion in the female spadices will supply, in the present state of our Loaledes, “sone characters for g a than any hitherto suggested. Three types are resen : First - Where the apex is dilated into rhomboidal lamina, yas teeth on the two upper margins of the rhomb, the terminal on being usually much larger. To this poe ae C. circinalis, C. Rumphii, C. Seemanni, the Australian species, &c, Seco: ae Where the lamina is af ae broad, and is deeply Linn., C. inermis Lour,, and C OT enione hee deseri bed. Third. Where the lamina is broader than long, and the spiny teeth are borne chiefly on the upper ma rgin. To this group belong the species discovered a figured by W, Griffith,—C. pec- tinata Griff., C. Jenkinsiana Griff., C. macroca saa ne The ‘materials for the history of this group are still very imperfect the arium of Dr. Hance, which was some years ago JOURNAL OF Serie’ ou. 81; [Janvary, 1893.] g ON CYCAS TAIWANIANA AND C. SEEMANNI A. Br. acquired by the British Museum, there is part of a leaf and three foliar — of a Cycas from the Island of Formosa. It belongs of C. reroluta, though the barren lamina approaches the srecies sof the ei group. It may be thus described :— s Taiwaniana, sp. noy.—Leaf with numerous erecto- patent subopposite segments springing from a terete rachis ; petiole unknown ; segments flat, linear-lanceolate (5 to 7 in. long, rather more than + in. broad), decreasing below to a base about oa the 8 on e e unkno emale spadices nearly glabrous, long, with slender sania fruit (8 or 4) borne above the middle; lamina nearly as broad as long, deeply any on both sides into linear comicets spines of the same substance as the lamina; terminal spine some- what vig broad and serrate. The specific name-is from Tai-wan, the native name of Formosa. "We more definite information is contained on the label than that the specimens were collected in the island of Formosa by r. Swinhoe, and sent to Dr. Hance in the autumn of 1867, from whose herbarium, as I have said, came the specimen in the British Museum on which the species is found n the Flora Vitiensis Dr. Seemann described a Ci ycas which he found i in the Fiji Islands, and referred to (. circina/is L. A. Braun subsequently peop out geome by which he separated it from C. cireinalis L. and name » Seenanni. Baron von Mueller has described the plant at Teng. “Dr. Masters having lately given the tore Departm a series of photographs “of the plant, it med to the Editor desirable to give an illustration of this fine Ohad; discovered by and named after the founder of this Journal. It has a stem thirty at high. In the specimen figured from the ch. e stem is marke by alternate constrictions and enlargements, caused by the idtenistios of the fruiting spadices and the normal leaves. The scars left by the spadices are smaller, preading and urved; they gradually decrease from a little above the podiutibked base, and end in a long acuminate apex. The male cone is two feet. long, and. the scales have a short, acute, sobondiins apex on the upper part of thecone. The female spadix bears from. six to eight » Subtriangular apex, with small spines along id a@ terminal one scarcely larger than the others. It was found in Viti-Levu and Ovalan ws Dr. Seemann. In the Museum Herbarium there are specimens of a Cycad from 8 Tonga Islands, collected by Banks and Sohainler in Capt. Cook’s segments of the leaves, on the presence of a large terminal spine on the i but until more materials are abtahied from the Tonga, KEY TO BRITISH RUBI. 3 Fiji, New Caledonia and nein bnoanins islands, it is undesirable to add new names to the genus, as they may represent only unim- portant geographical fpalineatiin. ExpLanations or Puates. Tas. 330.—Cycas Seemanni A. Br. Representing the general aspect of the plant, the male and the fe on fruiting heads, with a single spadix, all somewhat reduced in size from photo AB. 331.—Cycas Falvenisnk. from specimen in the British Museum. AN ESSAY AT A KEY TO BRITISH RUBL By tHe Rey. W. Moye Rogers, F.L.S. {Continued from vol. xxx.,.p. 341.) Grove 8. Betuarprant (= Guanputost Focke).—St. mostly prostrate and roundish, rooting, often Sincatts All the stems densely clothed with stalked glands, bristles, acicles and prickles of various pre sizes. Prickles more frequently weak than in the Rapuuz and the Korsterianr; often subulate. Pan. racemose or with racemose lateral branches at the base. All the lts. distinctly stalked. Stipules filiform. Stam. rather frequently falling short of the styles, or barely caliailiag fats Usually rather small low-growing plants. A. Stalked glands very unequal; some of those on the pan. longer than the diameter of the ped.:—(74) viridis; (75) Duro- trigunn; (76) divexiramus ; (77 pork lus ; eal Bellardi ; (79) serpens ; nas hirtus and vars. All nearly allied pla . Stalked glands short; those on the pan. hidden in the dense oa or felt (*‘ sunken ’’), or at least shorter than the diameter of the ped. :—-(81) te) arragits es ? oigoclados aud vars. 74. R. virmis Kalt. J Bot. 1890, pp.. 134, 166. R. in- eultus Wirtg. Syn. Bh, p.- "369. —St., petioles, pe “1 alee 3 and te see ate; term, roundish or bro - ovate-cuspidate or plliptio-scuminate from a slightly emarginate base, often with 1 or 2 lobate dentitions above the middle (usually on one side only). Pan. usually rather long and lax, pyramidal, with straight rachis and numerous nearly patent few-flowered branches, de