320 OttlGtNAL ARTICLES. 



Ad. de. Monograph des Malpigliiacees, p. 118. Many of the 

 climbing species are remarkable from the very deep, longitudinal 

 channels in their wood-mass, filled by the cortical tissue, which 

 forms radiating plates from the circumference towards the centre. 

 Usually these plates are four in number. In Bignonia capreolata 

 (p. 119) the annual wood formations are separated by circles 

 of wide vessels. In older stems the origiaal, symmetrical, 

 4-lobate, woody axis becomes broken up, the four lobes being 

 separated by a cross of parenchymatous tissue, and each, deeply 

 groved in its margin, gives off into the cortical tissue ligneous 

 bvmdles which agaia unite and merge into the parent mass. Each 

 of the lobes retains a portion of the original medullary sheath at 

 its inner angle. Generally the Bignoniaceae are distinguished 

 by a symmetrical regularity. The invading plates and cones 

 (in cross section) of cortical tissue consist almost entirely of 

 liber. — Criiger, H. Einiger Beitrage z. Kenntniss von sogenann- 

 ten anomalen Holzbildungen des Dikotylenstammes. Bot. Zeit. 

 1850, 101. A detailed account of the structure of SpatJiodea 

 corymhosa, Bignonia unguis (liane species), with figures, and of 

 Tecoma ^-jphylla (arborescent.) — Bignonia. Lindley, J. Introd. 

 Botany, i. 213. Eigure of 4-lobed woody axis. — Schacht, H. 

 Lehrbuch. i. 342. ii. 59. Der Baum. 103. 



BoEAGiNEAE. — BoTago. Cassini, H. Opviscules phytologiques, 182G, 

 ii. 517 — Crijger, H. Bot. Zeit. 1851, 468. On structure of 

 Tournefortia hirsutissima. — Pulmoiiaria, Omphalodes. Vaupell, 

 C. Ueber. d. peripherische Wachsthum d. Gefassbiinclel, &c. 

 Leipsic, 1855. 22, 2(5. 



Labiatab. Mirbel, Mem. sur TAnatomie, &c. d. Labiees, Ann. du 

 Museum, 1810, xv. Tige, p. 223, with figures.— A. Kirchhoff, De 

 Labiatarum Organis Vegetativis commentarium Anatomico-Mor- 

 phologicum. Erfurti, 1861. 



Verbekaceae. — Avicennia. — Scldeiden, Wiegmann's Arch., 1839, 

 pt. 3, A. N. H. iv. 245. The wood consists almost wholly of 

 porous vessels. Principles of Bot. 63. — Henfrey, A. Micr. Diet. 

 ' Wood:— Pefrcsa. Criiger, H. Bot. Zeit. 1857, 305. Structure 

 of the wood of. Also Tectona, p. 304. 



ScEOPHULAEiACEAE. — Bliinantlieae. Chatiii, A. Comptcs rcndus. 

 1857, 470, and Ami. Nat. Hist. Ser. ii. 19, 331. Bull. Soc. 

 Bot. iii. 14. — also in Anat. Comp. d. Vegetaux, Livr. 5, 137, 

 with plates. Various modifications of stem-structure are de- 

 scribed in detail in Oholaria virginica, Castilleja arvensis, 

 Schalbea americana, Bartsia viscosa, B. lati/olia, B. olpina, 

 B. chilensis, Trixago Apula, Odontites rtihra, O. Jaubertiana, 

 O. UUea, O. longijlora, Euphrasia ojjicinalis, E. minima, E. tricuspi- 

 data, E. alpina, E. speciosa, E. pahulosa, Gymbaria dahurica, 

 BJiinantlius glabra, RltyncJiocorys Elephas, Pediciilaris palustris, 

 P. sglvatica, P. Ferrotetii, P. vertieillata, P. foUosa, P. comosa, 

 P. scepimm-Carolinum, P. striata, P. grandijlora, Ilelampyrum 



