64 



Verbena urticaefolia 

 Carduus lanceolatus 

 Polygonum pennsylvanicum 

 Fragaria virginiana 

 Pteris aquilina 

 Plantago major 

 Solanum carolinense 

 Diodia teres 

 Cerastium vulgatum ? 

 Agrimonia sp. 

 Hedeoma pulegioides 

 Potentilla monspeliensis 

 Erigeron ramosus 

 Daucus Carota 

 Ambrosia artemisiifolia 

 Plantago lanceolata 



Lepidium virginicum 

 Polygonum aviculare 

 Bidens bipinnata 

 1-espedeza striata f 

 Euphorbia coroUata 

 Anthemis Colula 

 Euphorbia maculata 

 Erechthites hieracifolia 

 Leptilon canadense 

 Trifolium pratense 

 Gnaphalium purpureum 

 Acalypha gracilens 

 Oenothera biennis 

 Gnaphalium polycephalum 

 Euphorbia Preslii 



Of these weeds about 28 per cent, are supposed to have been 

 introduced from Europe and 2 per cent, from Asia, while the re- 

 maining 70 per cent, are considered indigenous by nearly all 

 systematists. And yet all the supposed natives, with five or six 

 exceptions, are confined to unnatural habitats, exactly like the 

 introduced species, from which there is no possible way of dis- 

 tinguishing them without the use of botanical literature, such as 

 a manual, and even that is not infallible. At least half, perhaps 

 two thirds, of the species in the above list evidently belong to 

 that class of native weeds (mutants ?) which I discussed just be- 

 fore going to North Carolina. | 

 College Poin'I', New York 



MAGNOLIA AT FLORISSANT § 



By T. D. a. Cockerell 



The Miocene flora of Florissant, Colorado, includes so many 

 genera living today in the southeastern states, that the apparent 

 absence of Mag-no/ia has seemed remarkable. During the past 

 summer, however, a leaf which may I think be referred to this 



* See Gray, Am. Jour. Sci. 42 : 27. 1842. 



f See Gattinger, Fl. Tenn., 107. 1901. 



J Bull. Torrey Club 35 : 347-360. July, 1908. 



§ Illustrated with the aid of the Catherine McManes fund. 



