^o 



on the rocks, and a new variety o{ Pentstemon IcBvigatus"^ — 

 the latter a handsome plant with white or light purplish 

 flowers. We also found it later on the Peaks of Otter' and at 



f 



i. 



Clefnafis ovata, Pursh, is, then, apparently a good species, evidently rare, 

 and not yet collected in flower, so far as I can ascertain. 



All authors have been mistaken in describing C. Addisoniia.s strictly erect. 

 To be sure, nothing but the tops of small plants had previously been col- ' 

 lected, and from the solitary flower and simple leaves this was the most natural j 



conclusion. Some of the smaller plants are obliquely erect, but the 

 relationship is with €• Viorita rather than with C. ochroletica. C. Viorna was, 

 indeed, collected and observed in considerable quantities on the same 

 bluff, and readily distinguished by its long, trailing stems, sometimes attain- 

 ing 10 feet or more, its smaller, always pinnate lower leaves, and acute leaflets 

 green on both sides. It comes into bloom at least two weeks later than C. 

 Addisonii, Several plants of an evident hybrid between them were also col- 

 lected, having characters exactly intermediate, which may be called Clematis 



VIORNIOIDHS. 



It is worth while recording that Pursh says in his description of C, ovata^ 

 that he considers the reference written in the Sherardian Herbarium to Pluke- 

 net's figure as not applicable to his C. ovata^ because that figure represents a 

 plant with trideatate leaves, and that he regards it as ''an imperfect specimen 

 of Clematis with compound leaves.'* However this may be, C. ochrolciica 

 occasionally occurs with toothed leaves, and we may expect this in any one of 

 the normally entire-leaved species. 



This William Sherard, pupil of Touraefort, whose herbarium has been so 

 important in working out the matter, was born in 1659 and died in 1728. He 

 founded the Chair of Botany at Oxford, and attached to it his botanical library 

 and herbarium of 12,000 species. 



O. Kuntze, in Verhand. Bot. Ver. Brandenburg, xxvi., 176, 177, refers C. 

 ochroleuca, C. ovata and also C. Fremoniii, S. Wats., to varieties of the European 

 C. iyitegrifoUa, making six subvarieties of C, ochroleuca. I believe that this is 

 as unphilosophical a treatment of the group as could well be devised. He 

 has also a subvar. sxibglabra of ovata, said to have been collected at Eagle 

 Pass, on the Mexican Boundary Survey, and preserved in the Berlin Her- 

 barium. I suspect a mistaken label as the cause of this publication, for there 

 is no record in the Botany of the Mexican Boundary of any Clematis from Eagle 

 Pass, and it is unlikely that any member of this group occurs in that part of 

 the country. Mr. Joseph F. James, fn his ''Revision of the Clematis oi the 

 United States" (Journ. Cincin. Soc. Nat. Hist., vi.), records having seen the 

 specimen marked C. ovata in the Philadelphia Herbarium, and says, ^'it is in 

 appearance simply a small ockroleuca,'' but he could not have examined it 

 very closely. — N. L. B. 



* Pentstemon l^vigatus, Sol. var. canescexs, n. var. More or less 

 finely canescent all over, sometimes densely so, simple, i°-2^ hio-h. Upper 

 leaves sessile and clasping, ovate or ovate -lanceolate, a'-j' long, acute, 

 dentate, those of the middle and lower part of the stem narrowed below \hQ 



