lo BOTANICAL GAZETTE. 



none in 1879. Lycoperdon cyathiforme, Bosc, numerous and very 

 large in 1877, has not been with us since. Scleroderma vul^are, Fr. , 

 plentiful in 1877, two imperfect forms in 1878, none \n 1879. — M. E. 

 Banning. 



Notes on Some Introduced Plants in Dallas Countv, Texas. — 

 These are notes on most of the naturalized plants in this county. 



Adonis autumnalis, L. , was imported by the French colonists in 

 1855, and appears in many fields and along the roads. 



JSasturtium officinale, R. Br., was first introduced about twenty 

 years ago, but became common only within four or five years 



Capsella Bursa-pastoris, Moench. was ^een for the first time in 1865, 

 but has become quite a common weed. 



Viola tricolor, L. var arvensis, Ging. , I am satisfied, is native. I 

 have met it in large patches in remote woods and prairies, sometimes 

 very far from settlements. The true V. tricolor has been naturalized 

 in gardens and seems to be keeping its characters very constant. I 

 believe the two may be considered good species. 



Portidaca oleracea, L., is certainly native, although it has been con- 

 sidered by most of the botanists as an introduced species. It infests 

 all cultivated fields. You may go 100 miles from civilization, break 

 the prairie, and the second summer will be sure to see it covering your 

 field This year in traveling on the northwestern frontier, far from 

 any settlement, I have met it growing in prairie dogs' villages, in 

 company with the P. pilosa and P. lanceolata, both considered native 

 species. 



Tribidiis maximus, L., was introduced about i860. 



Abutilon Avicennce, Goert. , made its appearance about the same time. 



Conia occidcntalis, L., belongs to the same period. 



Anthe'iiis Cotula, L. , dates from 1875, ^''^"d since has been very com- 

 mon in the city of Dallas. 



Jmpomea purpurea and / hederacea are common in some fields, but I 

 have not the date of their introduction. 



Datura Tatula, L. , is very common and was naturalized long ago. 



Martynia proboscidca, Glox, is sparingly 1 aturalized, but seems spon- 

 taneous in the West 



Verbena officinalis, L., is certainly nitive. It grows in all the sandy 

 woods and wild praries. The roots are positively perennial, which 

 does not agree with the description in the Synoptical Flora of Dr. 

 (jray. 



Marrubium vulgare, L. , appears in the neighborhood of cattle and 

 sheep lots after a few years of settlement. 



Boerhaavia viscosa. Lag., was first seen in 1876; B. stricta, in 1879. 



Rumex obtusifolia, L., seems perfectly at home in all damp ]:)laces. 



Chenopodium hxbridum, C. /nurale, C. ambrosioides and C. anthel- 

 fninticuni, are more i)r less common, the last seeming perfectly indigen- 

 ous. —J. Reverchon. 



