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200 MISSOURI BOTANICAL GARDEN. 



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railroad rights of way a.ong the Mississippi, both in St. Louis 

 county and in the IlUnois section, with railroad ballast ob- 

 tained from the Meramcc River gravel bars), Bergia texand 

 (W. U* S.), Tribulas gr audi floras (S. E. U. S.), Indigo f era lep- 

 tosepala (S. U. S.), Petalostemon villosus (W. U. S.)r Medicago 

 lupuHna (E. U. S.), Matricaria discoidea (N. California and 

 Oregon), Verhcsina encdioides (W. U. S.), Linaria vulgaris 

 (E. U. S.) and Sorghum halepense (E. U. S.)* 



Three plants are to be listed as ^' river immigrants." They 

 are Pluchea camphorata (E. U. S.), Martynia proboscidea 

 (W. U. S.) and Vcrhesina encelioides (W. U. S.), already men- 

 tioned as a railroad immigrant. 



In regard to the acclimatized cultivated plants, Brassica 

 alba and B. nigra, as well as Nasturtium officinale and N. 

 Armoracia^ Raphanus sativus, Pastinaca sativa, Cichorium 

 Intyhus, and Asparagus officinalis ^ are plants of the kitchen- 

 garden and usually found around dwellings, though some, 

 like Brassica alba, B. nigra and Asparagus officinalis y may 

 be found at a considerable distance from human habitations. 

 Dclph inium Ajacis, Saponaria officinalis and Hemerocallis 

 fulva are escaped ornamental garden plants. The latter 

 species is found in great abundance along roadsides in the vi- 

 cinity of Jefferson Barracks. Lamium amplexicaule, one of 

 the earliest weeds to flower here, is found especially near 

 greenhouses, lasting ahnost throughout the year. Another 

 plant, similarly limited to the vicinity of greenhouses, but 

 which thus far has been found only in the city of St, Louis, is 

 Galinsoga parviflora; it may become a troublesome weed. 

 Ballota nigra is found here and there in waste places, Prunus 

 Persica is especially abundant on the plateau at Jefferson 

 Barracks, bordering the roads and foot paths. Ailanthus 

 glandulosuSj Robinia hispida and R. P seiidaca-cia are trees 

 which easily spread in the vicinity of dwellings. The effect 

 of wind upon distribution is well shown in the case of the 

 latter species. The escape of the various plants used as cattle 

 food is too well know to discuss further. Neither need it be 

 pointed out that the various aromatic plants used as condi- 

 ments and commonly grown in kitchen-gardens have es- 

 caped in the vicinity of dwellings, though it may be of inter- 



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