S16 OEIGINAL ARTICLES. 



is not to hand. — Antidaj)hne viscoidea. Chatin, G. H. Anat. 

 Comp. d. Veget. (Parasites), tab. Ixxviii. Plate only received. 



CoMPOSiTAE. — Arctium. Buzareiugues, C G. de. Ann. Sc. ]Srat, 

 1833. 30. tab. vi. — Arctium and Onopordon. Hartig, Th. Bot. 

 Zeit. 1859. 91. — Centaur ea. Chatin, Gr. A. Anat. Comp. d. 

 Vegetans. Livr. iii. 9. (In note) absence of medullary rays in. 

 —Dahlia. Mobl, H. v. Bot. Zeit. 1855. 889. On liber of.— 

 Helianthus tuherosos. Turpin, P. J. P. Svu" I'organisation inte- 

 rieure, &c. Mem. du Musenm, 1839. xix. 1. 



Hamamelideae. Griffith, Asiatic Trans, xix. — BucJclandia, (p. 95) 

 Sedgeioickia (p. 99.) — Oliver, D. On Sycopsis. Linn. Trans, 

 xxiii. 83. AVith woodcuts. Observations based upon an exa- 

 mination of BucMandia, HJiodoleia, Trichocladns, Hamamelis, 

 Sycopsis, Eustigma, Distylium, Corylopsis and Liquidamhar, in 

 ■wliich genera a close uniformity in respect to minute wood 

 structure was remarked. The discs of the prosenchyma are due 

 to the presence of minute lenticular cavities between the ad- 

 joining wood-cells ; the canals opposed on each side to these 

 cavities are almost invariably elongated laterally, though some- 

 times nearly circular and very minute. The wood is traversed 

 by numerous vessels which are generally transversely barred. 

 The medullary rays are numerous and narrow. — BucJclandia. 

 The markings on the prosenchyma are very distinct. The medul- 

 lary rays are numerous, usually one cell in diameter ; vertically 

 they are very variable in extent, commonly presenting 10-12 

 superimposed cells, though I have counted about 45. (D. O.) 



CiNCHONACEAE. Weddell, H. A. Histoire Naturelle des Quin- 

 quinas. Paris. 1849, p. 18. Tab. i. ii. (C. Cali&aya) 24-30. 

 Also structure of the cortical layers of other species. The wood 

 presents annual zones traversed by medullary rays radially, 

 vertically by dotted vessels. Eadial, thin plates of thick-walled, 

 muriibrm parenchyma also occur, termed by M. Weddell, " faux 

 rayons meduUaires," and regarded by him as analogous Avith the 

 cellidar partitions in many liane stems. They occiu' in other 

 Hubiaceae. Large lacunes bounded by proper walls are found in 

 the pith. The liber cells are often of much wider diameter than 

 the cortical cells which they traverse, are very thick-Avalled, and 

 isolated, grouped 2-5 together or disposed in interrupted, radiating 

 plates. — Cincliona (succirubra and lueumaefolia). Klotzsch. 

 ilber d. Chinarinde. With plates. Abhand. K. Ak. Wiss. 

 Berliu, 1857, Q2.—Poederia. Mohl, H. v. IJeber d. Ban * * 

 der Eanken- und Schlingpflanzen. Tubingen. 1827, § 75. — Criiger, 

 H. Bot. Zeit. 1851, 470. On the structure of Sahicea hirta, 

 with figures. 



EuBiACEAE. — Bubia tinctorum. Decaisne, J. Sur la Garance, Ee- 

 cherches Anatomiques et Physiologiques. Bruxelles, 1837. Stem 

 Structure, p. 19, tab. v. Anatomy of an etiolated stem, tab. vii. 

 — Schultz, C. H. Die Cyklose. Nova Acta. 1841, xviii. Suppl. ii. 

 tab. XX v. 



