314 OEIGIKAL ARTICLES. 



Caulibus Begoniacearuin imprimis iis qui vasorum fasciculis in 

 pareuchymate medullari dispersis simt praediti, 1858. Berlin; 

 and also Anatomische Untersuchungen uber die Stiimme der 

 Begoniacien. BerHu, 1859. With 8 plates. Eeferring especially 

 to the structure of the wood-mass, presence of vascular bundles 

 in the pith (out of 128 species observed, 28 had medullary vas- 

 cular bundles), and course of the fascicles. 



Umbellifeeae. Buzareingues, C. Gr. d., Ann. Sc. Nat. 1833. 30. 

 Sur I'ordre de distribution des fibres dans le corps central de la 

 tige, p. 347. — Jochmann, E. Gr. De Umbelliferarum Structura 

 et evolutione nonnulla. Breslau, 1855. § 3. The normal type 

 presents a wood-zone surrounding the pith, which latter in pro- 

 gress of grc^i^h disappears, leaving a cavity from node to node. 

 This wood-zone is usually continuous, traversed by very narrow 

 medullary rays and made up of primary fascicles formed by the 

 cambium of the bud and secondary ones subsequently developed. 

 The former each have two liber bundles opposed to them, the 

 latter but one bundle each. In Silaus pratensis the pith is 

 traversed by scattered vascular cords. — Hartig. Th. Bot. Zeit. 

 1859. 96. — Angelica, Cicuta. Schultz, C. H. Die Cyklose. Nova 

 Acta, 1841, xviii. Suppl. ii. tab. xxi.-ii. — AntJiriscus, Link. H. F. 

 Icones Anat. Bot. 1837. Fasc. ii. x. 6.* — Seracleum, Link. H. 

 F. Icones Anat. Bot. 1837. Fasc. ii. xii. 1-3. 



AEAiiiACEAj:. Aralia 7'acemosa. Gray, A. Introd. Botany (1858,) 

 118. Vascular bundles in the pith (in note). — Hedera. linger, 

 Fr. Beitrage z. Kenntniss d. Parasit. Pflanzen, 1841, tab. vi. 



LoEANTHACEAE. Kortlials, P. W. Verhand. over de op Java, &e. 

 verzamelde Loranthaceae, p. 210. — also Aanteekeningen o\'er 

 eenige Soorten van Loranthus in v. der Hoeven und Vriese, 

 Tydschrift, 1836. (stam.) p. 189. —W. Griffith. Parasitism 

 of. Linn. Trans, xviii. 78. — Karsten, H. Beitrag zur Ent- 

 wiekelungsgeschichte der. Bot. Zeit. 1852 (Holz.) 361. With 

 fig. — Viscum. Eaeser, Mem. sur Torganisation des plantes, 1814, 

 305, tab. 22.— Bischoff. Lehrbuch, ii. 62.— Link, H. F. Icones 

 Anat. Bot. 1837, fasc. ii. x. 7-8. Icones Selectae, 1842, fasc. iv. 

 viii. i. 7.— Unger, Frz. Beitrage z. Kenntniss d. Parasit. Pflanzen, 

 1841, tab. iii. vi. — Chatin, G. A. Anat. Comp. d. Veget. (Parasites) 

 tab. Ixxix.-lxxx. Plates only received. — Decaisne, M. De la Struc- 

 ture ligneuse du Gui. Compt. Eendus, 1839, 204. — also Me- 

 moire sur le Developpement du Pollen, de I'ovide et sur la 

 Structure des Tiges du Gui. Ext. Mem. Ac. Eoy. Bruxelles, 

 1839, xiii. With figures. The pith is immediately surrounded 

 by eight fascicles, corresponding to the inner edges of the eight 

 primary wood-bundles, these consist of elongated fibrous cells, 

 similar to those of the cortical liber fascicles ; they are accom- 



* The root sti-ucture of other UmbclUfcrae is figured in ' Icones Selectae,' tab. 

 iii. & iv. 



