40 M. DeCandolle on the relative Duration of the Power 



lished in the 'BibliothequeUniverselle de Geneve/ The maximum 

 several times reached 30° and even 31° Cent, (about 86° Fahr.). 

 The pots were kept under examination till the autumn, but 

 scarcely any seeds sprung up after the end of June. 



The following are the species submitted to experiment. Those 

 which did not come up are in the ordinary type ; those of which 

 a few came up, the number being less than half the twenty seeds 

 sown, are in italics ; lastly, the single species of which more than 

 half came up, is in small capitals : — 



Asclepiadece. 

 Asclepias amcena. 



AmyridecB. 

 Amyris polygama. 



Amaranthaceat. 

 Amaranthus prostratus. 



caudatus. 



giganteus. 



cernuus. 



paniculatus, 



curvifolius. 



speciosus. 

 Celosia avgentea. 

 cristala. 



BalsaminecR. 

 Impatiens Balsamina, fl. pi. 



Boraginece. 

 Echinospermum Lappula. 

 Lithospermum officinale. 

 Asperugo procumbens. 

 Anchusa ovata. 



Campanulacece. 

 Campanula sibirica. 



pyramidalis. 

 medium. 



CapparidecB. 

 Cleome viscosa. 

 triphylla. 



Caryophyllece. 

 Silene apetala. 

 conoidea. 

 gallica. 

 cerastioides. 

 vespertina. 

 frutieosa. 

 quinquevulnera. 

 conica. 

 tricuspidata. 



Silene antirvhina. 

 noctiflora. 

 Lychnis Githago. 

 Gypsophila scorzoneraefolia. 

 Arenaria marina, 

 media. 

 Gypsophila vaccavia. 



Chenopodece. 

 Atriplex tatarica. 



rosea. 



hortensis. 

 Basella alba. 

 Blitum virgatum. 

 Beta maritima. 

 Chenopodium maritimum. 

 Emex spinosus. 



Cistinece. 

 Cistus villosus. 



monspeliensis. 

 Helianthemum salicifolium. 



Composilce. 

 Gnaphalium sylvaticum. 

 Crepis aspera. 



Parthenium hysterophorum. 

 Geropogon australis. 

 Onopordon illyricum. 

 Calendula suffruticosa. 

 Melananthera deltoidea. 

 Artemisia vallesiaca. 

 Pyrethrum corymbosum. 

 Flaveria contrayerva. 

 Chrysanthemum coronarium. 

 Centaurea atropurpurea. 

 Artemisia annua. 

 Barkhausia graveolens. 

 Artemisia Abrotanum. 

 Pyrethrum daucifolium. 

 Zinnia multiflora fl. luteo. 

 Artemisia camphorata. 

 Verbesina serrata. 

 Eclipta erecta. 

 Bcebera chrysanthemoides. 

 Flaveria repanda. 



