JUGLANDACEAE OF THE UNITED STATES. 45 
are actually of hybrid oriirin, while others, like the tree of 
Dr. Schneck, and those occurriiifr spontiiMeously in Europe, 
:ire probably only alx-rrnnt forms ro-pcclively of }u'>jrn .-aid 
rcgia. Quite reeently Profe.-or S;irn:(.nt * h:i^ (loM ii!)(.d 
and figured what he rt'<::ird-; as a hyf)rid hctwccn r< >iia and 
cinerea,ihQ twi,Lr< of uhirh :nv mnvh niorr likr tl....,^ of 
rc'jia than those of i-ilhn- ,.f ihr ^upp-.^.d >[.,.nt.oM'uu> 
hybrids that I hav,- mth. ihou-h with un-r.- elon-alr.l l.iids 
and sometinu-> a little puhcM-ont in tin' axiU of thmoi.-lird 
leaf scars. In tlu' same arti- io nu«nti.u, i. ,n:i<h- ..f >i-veral 
artificial hybritis }u-odm ed in Califoi nia by Mr. Liitlu r Bnr- 
bank, between Californiof and both ui'jrn :uid r^'jio. Twiirs 
of the first of the.-c hybrids, for which I am indebted to 
Mr. Burbank, are downy and closely resemble those of 
nigra except that their jrray terminal buds are usually twice 
as long as broad; while the twigs of the second are very 
stout, glabrous, aud with large globose loosely gray tomeu- 
tose buds. 
The half-tones are from photographs taken by the 
author or contributed by correspondent.-- who.-e donations 
are indicated in the dc>. rii)tion. The other i)late> are from 
Plate l.-Uicoria P^.can, an old tree U ft. in circ«mferenc.-, iwxt Mt. 
Cannel, 111. Photonxaphed by Dr. Schneck. 
Plate 2.— Bark of Ricoria Pecan, Caruthersvilie, Mo. 
Plate 3.— Group of Eicoria aquatica, Campbell, Mo. Photoirraplied bv 
James Oxley. 
-oue of the trees of Plate 3. 
Mt. Carmei, 111. Photographed by Dr. 
Plate 6.— Bark of Hicoria minima, St. Lonis, Mo. 
Plater. — Bark of Eicoria glabra, Ithaca, N. Y. Photographed by 
Tofessor Rowlee. 
* Garden and Forest, vu. 434; SUva, vii. il4. 
