Mr. Geyer's Plants of Illinois and Missouri. 101 



flowers compacter than in V. vrticcefolia, but not as densely im- 

 bricated as in V. sti-icta or V. paniculata ; the calyx much longer 

 than in V. urticcsfolia, canescently hairy ; corolla large, interme- 

 diate in size between both parents, and pale purple. 



This is the most abundant hybrid here, and both parents are 

 amongst the most common weeds about St. Louis. Flowers in 

 July and August. 



102. Verbena ^urticssfolio-paniculata: leaves petioled, lanceo- 

 late, with simple, double, or sometimes incised serratures, gener- 

 ally elongated ; spikes thin, more properly filiform than in any of 

 our species; calyx and corolla intermediate in shape, size, and 

 color, between both parents. It resembles some varieties of the 

 true V. paniculata, but the dark purple flowers, and the thick 

 cylindric fruiting spikes, at once distinguish it. 



St. Louis and Beardstown ; grassy places and open woods. 

 July and August. 



Besides these four hybrids, I have found here the correspond- 

 ing ones more nearly resembling the other parent, which I desig- 

 nate by the same names, reversing the order, viz. 



Verbena sir icto-panicv lata : greener, narrower, more petioled 

 leaves, darker flowers, than V. panicvlato- striata. 



V. bracteoso-urliccefolia : adscendent, with large lobed leaves, 

 and thinner spikes. 



V. urticcefolio-stricta : canescent, with sessile leaves, and thin 

 filiform spikes. 



V. paniculato-urticcefolia : with broader leaves, thinner spikes, 

 paler and smaller flowers. 



Then there is the V. angustifolio-stricta and V. stricto-angusti- 

 folia. Hybrids of V. angustifolia with any but V. stricta, and 

 of V. bracteosa with any but V. urticcefolia, or of V. Aubletia, 

 the only remaining species in this region, I have not yet found. 

 The only other hybrid found by me in this country, is Rumex 

 obtusifolio-crispus. Whether these introduced plants hybridize 

 in their native country is unknown to me. 



103. Androsace occidentalis, 



Pursh. 



104. Lysimachia revoluta, 



Nutt. 



105. Plantago cordata, Lam. 



106. Polygonum tenue, 



Michx. 



107. Polygonum sagittatum, 



Linn. 



108. Croton glandulosus, Linn. 



109. Borya ligustrina, Willd. 



110. Gtuercus nigra, Willd. 



111. Q,uercus alba, Linn. 



112. duercus castanea, Muhl. 



