448 



APPENDIX 



genus, points out (p. 18) that the confusion of the two species has 

 frequently given rise to very inaccurate accounts of their distribution. 

 The difficulty seems to have arisen in connection with the early 

 use of the specific name of lobelia as imposed by Linnaeus. Krause 

 in re-examining the whole question must have experienced some 

 difficulty in the process of selection, and it is not surprising that there 

 is an omission here and there. Thus I found Sc. kcenigii to be in 

 1888 a characteristic plant of Keeling Atoll, where it had been pre- 

 viously collected by Darwin in 1836, the list of his plants being deter- 

 mined by Henslow (Ann. Nat. Hist., I., 337, 1838; Chall. Bot, IV., 

 113; Journ. Vict. Inst. London, 1889). 



Note 6 (p. 407). 



The strand plants of Teneriffe and of the north-east corner of Grand 



Canary. 



I examined the strand vegetation at various places on the coast 

 of Teneriffe, namely, between S. Juan de la Rambla and Orotava, 

 at Punta Hidalgo and in its vicinity, at Taganana and Armasiga, 

 between Santa Crux and S. Andres, and to the south of Santa Cruz. 

 The shore was mostly rock-bound, the beaches being generally few 

 and scanty, so that the littoral plants as a rule were those that find 

 their home on coastal rocks and on sea-cliffs as well as on the beaches. 

 However, the beach flora was well developed on the sandy isthmus 

 connecting La Isleta with the north-east corner of Grand Canary. 

 But a much more extended acquaintance with the group would 

 be required before one could venture to discuss the shore flora of 

 the Canary Islands as a whole. Here there is merely offered a con- 

 tribution to the subject from the standpoint of dispersal. 



In addition to several plants familiar on our English beaches, 

 such as Atriplex portulacoides, Beta maritima, Crithmum maritimum, 

 Euphorbia par alias, etc., there were a number of others, that either 

 do not extend north of Southern Europe and the Mediterranean 

 region or are confined to this and other Atlantic archipelagos (Azores, 

 Cape Verde Islands), such as Frankenia ericifolia, F. pulverulenta, 

 Mesembryanthemum crystallinum, M. nodiflorum, Zygophyllum, etc. 

 Then there was the local element, which we should expect to find 

 in all strand floras where the inland plants come down to the coast. 

 Thus in places those strange-looking shrubs, the cactoid Euphorbia 

 (E. canariensis) and Plocama pendula, which so often give a character 

 to the barren hill-slopes of basic tuffs and lavas that descend steeply 

 to the sea-border, come down to the coastal rocks, where they associate 

 with typical shore plants like Crithmum maritimum and Zygophyllum. 



Amongst other strand plants of Teneriffe may be mentioned a 

 Statice and a stout fleshy yellow umbellifer unknown to me. Both 

 grow on the coastal rocks and ascend the precipitous lava slopes for 

 100 or 200 feet or more. The umbellifer is remarkable on account 

 of the greenish-yellow hue of the whole plant, its leaves being deeply 

 cut into three cuneate lobes indented on their upper border. I 

 may remark that in addition to the ordinary form of Crithmum mari- 



