18 
BISTORY OF THE BOTANICAL 
It is to be regretted that Schweinfuxth was not allowed to complete 
this interesting contribution. The enumeration of his plants goes only 
as far as the Euphorbiacea. As to the remaining orders, Schweinfurth's 
Aden-plants were made use of in Krause's “ Beitrage." 
A. Defiers, 1885, 1886, 1889, 1890.— Defiers, the well-known French 
traveller, to whom we owe so much of our present information on 
Yemen, 1 stands undoubtedly foremost in the ranks of botanical explorers 
of Aden. 
He visited this place for the first time in March and April 1885. 
Torrential rains had fallen almost without interruption from the 12th 
to the 14th March, and more abundantly still on the 21st. It is doubt- 
less owing to this favourable circumstance that Defiers found an excep- 
tionally great number of plants in flower and fruit, and amongst them 
several which had been very incompletely described before. Special 
interest attaches to his report in the “ Bulletin de la Soci^te de France/' 2 
because it includes a number of specimens collected for the first time in 
Little Aden. 
This list of plants mentions the following species which had not been 
noted in Anderson's Florula. 
Cleome brachystyla Defl., Maerua crassi/olia Forsk., Gypsophila 
montana Balf ., Corchorus trilocularis Linn., Fagonia parviflora Boiss., 
Crotalaria leptocarpa Balf., Crotalaria lupinoides Hochst., Indigofera 
semitrijug a Hochst., Indigofera paucifolia Del., Indigofera argentea 
Linn., Foinciana elata Linn., Cassia adenensis Benth., Acacia laeta 
Defl., Cor alio car pus glomeruliilorus Schweinf., Trianthema pentandra 
Linn., Dohera glabra DC., Calotropis procer a It. Br., Caralluma ForsJcalii 
K. Schum., II eliotr opium pter ocarpum Hochst. & Steud., Schwein furth ia 
pterosperma It. Br,, Orthosiphon pallidus Boyle, Salsola Bottoe Boiss., 
Atriplex farinosa Forsk., Boerhaavia verticillata Poir., Euphorbia 
polycnemoides Hochst., ForsJcohlea viridis Ehrbg., Littonia minor Defl., 
Bipcadi erythrmum Webb. & B., Andropogon foveolatus Del., Andro- 
pogon Iwarancusa Jones, Aristid a paradise a Edgew. 3 
Defiers visited the same places for a second time “ towards the end of 
spring, 1886." We have seen labels giving the date “ May 1886 " but we 
are not sure whether it was only during this month that he collected at 
Aden and on Little Aden, or whether he prolonged his stay. 
1 Deflers 3 A.: Voyage au Yemen. Journal d’une Excursion botanique faite en 1887 dans 
lea montagnes de l’Arabie Heureuse. Paris, 1889, 246 pp. ; 6 pi. 
2 Defiers, A.: Herborisations dans les montagnes volcaniques d’Aden. Bull. Soc. Bot. 
Prance, Vol. 32 (1885), pp. 343-356. 
s These names are given in the nomenclature adopted below, which are not always 
Deflers\ 
