508 GEYER’S PLANTS OF ILLINOIS AND MISSOURI. 
M. MACROSPERMA, 7. sp. : calycibus 5-fidis, laciniis calycis fructiferi ovatis triangularibus acutis 2 inferioribus 3 
superiores duplo superantibus, omnibus erecto-conniventitvus tlavo- s. ferrugineo-hispidissimis ; racemis basi subfoliatis ; 
pedicellis fructiferis calyce brevioribus basi adpressis ; calycibus horizontalibus ; tubo corolle denique calyce longiore ; 
nucibus maximis. Texas, prairies, April. F. Lindheimer. — Nuts of same color as both others, but twice as large as 
those of the last, and larger than those of any European species examined by me; uncinate hairs of the calyx very 
long, stiff, spreading in all directions ; flowers not so crowded as in both the foregoing species. 
87. Puacetia Pursuit, Budics, in Sill, Journ. xlv.171. 88. Puysauis Pennsytvanica, Linn. Some of the 
specimens have smooth, and others pubescent or hairy calyces ; these last ones constitute the P. lanceolata, Michx. 
-? 92. H MA 
89. PENTSTEMON ager) Linn, 90. Cotiinsia vERNA, Nutt, 91. GRATIOLA AUREA te) 
PULEGIOIDES, Pers. . H. nispipa, Pursh. 94. PycNantuemuM PILosuM, Nutt. 95. Monarpa Punctata, [99] 
Linn. 96. Aaa Viremianum, Linn. 97. ScuTELLARIA GALERICULATA, Linn. 
ERBENA PANICULATA, Lam. With undivided leaves, the true V. paniculata; and with the lower leaves 
divided, lobed or hastate, V. hastata, Linn., which can hardly be called even a variety. As Lamarck’s name is equally 
_— to both forms, it probably ought to be preferred to the Linnzan name. 
ol Four hybrids of different species of Verbena, which together with several others that abound in this 
Nephadhoey Mr. Geyer appears to have found equally abundant on the sandy wastes near Beardstown, and on the 
sandy pin of the Illinois River, 
The names, chosen according to Schiede’s proposition, indicate the parent plants; but it is often difficult enough 
to detect oa parentage ; indeed, to ascertain which is the male and which the female parent is probably quite impossi- 
ble if actual experiments be not instituted. Generally both parents grow near the hybrid, but as these Verbenz are 
perennial, the hybrids, being unable to produce seed, propagate the more readily by stolons, and spread in some locali- 
ties so as even to exceed one or the other of the parents in number. In such eases we have to rely entirely on the 
resemblance of the offspring to some true species in the vicinity. All these hybrids, however, are known to be such 
by their luxuriant growth exceeding that of their parents, by their sterility, and mostly by their local appearance in 
places where their parents are common, We find, as is naturally to be expected, many bybrids which resemble one of 
their parents more than the other; and hence many intermediate hybrid forms may be observed, so as to furnish all 
the connecting links between two very distinct species ; this of course not proving the identity of such species, but 
rather teh reverse. No hybrids are more common here than those between V. stricta, Vent. and V. urticefolia, Linn., 
ss specimens not only of V. urticefolio-stricta (near V. stricta), and of V. apis achieseates (near V, urti- 
cefolia), a of several intermediate forms, the extremes of which might be taken for mere varieties of V. stricta and 
of V. urticefolia ; or they may be produced by seeds from these plants, adulterated by some pollen from the 
her species. The difficuity is increased by the fact that these doubtful hybrids produce more seeds ‘aa the [100] 
nearly intermediate hybrids, though far less than the true species. In the course of time, if they propagate at 
all, they may revert again to their parental —— especially if the very probable supposition be true, that, when the 
ovary of these hybrids is fertile, the pollen is in 
99. V. PANICULATO-STRICTA : more aac shal V. paniculata, but not canescent like V. stricta; leaves much 
narrower than in V. stricta, subsessile or decurrent in a short petiole, simply or doubly or incisely serrate ; spikes more 
crowded than in V. paniculata, more fascicled, not paniculate ; calyces hairy, somewhat gray, longer than in V. pant- 
culata; corolla intermediate in size and color, much paler than in V. paniculata; style persistent for some time on the 
ripening fruit, as in V. paniculata, Grows in abundance on the sandy, sometimes overflowed, banks of the Mississippi, 
opposite St. Louis, with other hybrid forms, and with V. stricta, V. urticefolia, and V. bracteosa. V. paniculata is 
very rare there, perhaps destroyed by the growing bushes, which now cover the formerly grassy spots. Nevertheless, 
the narrow leaves, deeper colored flowers, and persistent style prove sufficiently that V. paniculata is one of its parents. 
Flowers in July and August. 
00. V. URTIC#FOLIO-BRACTEOSA : decumbent like V. bracteosa, but large, spreading sometimes two or three feet; 
leaves small, like V. bracteosa, laciniate ; spikes fascicled, filiform , flowers distinct, as in V. urticefolia ; bracts longer 
than the calyx, but not more than half as large as in V. bracteosa; corolla larger than in V. urticefolia, with a longer 
tube, very pale purple. The parents of this hybrid cannot be mistaken; the growth, the leaves, the bracts are of one, 
the spikes, and the smaller size and paler color of the corolla of the other. On sand-bars and sandy islands in the 
Mississippi (St. Louis) and Illinois Rivers (Beardstown). Flowers July to September. 
101. V. sTRIcTO-URTICHFOLIA: an interesting hybrid between two very distinct species. The plant is more 
canescent than V. urticefolia ; the leaves shorter petioled, sometimes nearly sessile, of firmer texture, and not simply 
~ but generally doubly or even incisely serrate ; sometimes even so much incised or lobed that I would have 
nelined to look to V. hastata or V. bracteosa for an explanation, but we cannot admit the action of three 
* For further remarks on this subject see Transactions of the St. Louis Academy of Science, vol. i., Journal of Proceedings, 
Sept. 5, 1859, pp. 675, 676 ; and Botany of the Upper Missouri (Hayden, in Transactions of the American Philosophical Society, 
1862, n. s. vol. xii. p. 202). — Eps. 
. 
