186 NATURAL HISTORY MISCELLANY. 
changed into two species of the same name; tinctoria var., sinuosa into 
discolor, and his Q. myrtifolia is probably a variety of Q. aquatica. 
Persoon in ** Synopsis Plantarum," 1805 enumerates MA five oaks, of 
Nort 
posed 
five new species: Q. ieee! which proves to be an hybrid; ambigua 
and borealis, which fall und pi coce "a ; ^fi A e which is Q. nigra 
L. 8.; and oliveformis, whic 
Humboldt and Bonpland nites Eris -1808) mer -three new spe- 
cies, of which thirteen are now considered a a Qs see 
crassifolia, crassipes, depressa, Humboldtii, ee a ind, obtusat 
pulchella, repanda, reticulata, Tolimensis, Xalepensis; four are evum 
Q. Amalguerensis, chrysophylla, glaucescens and sideroxyla ; three had been 
described already by Née: Q. eu. XR Pep Née; trid astanea 
var. 7, and Mexicana = Castanea Née var. E; three are the same as 
other species of the same authors: Q. sata is reticulata H. B.; pan- 
durata and ambigua are obtusata H. B., va f. They are all Mesi- 
can, except three from New Granada : liv Tolimensis s setter 
erensis. ‘They are described in perdis Æquinoctiales,” 18 818. 
acter, the second the presence or absence o the bristles of the leaves; 
the third the form of the leaves. 
Nuttall in ** Genera of North American Plants," 1818, follows the same 
Escorts 2 the number of his species is thirty-two. He calls Q. 
Prinus discolor Mich. fil. Q. Michauxii, but at the same time he keeps Q. 
bicolor Willa. as a species with the variety mollis (probably Q. velutina 
Lam., which he believes is : filiformis Muhl.). Afterwards he proposes 
three. more species: Q. Gambelli, Leana (a hybrid) and dumosa (in ** Silva 
ee a doubtful species. Of Mexican species he knew ouly fif- 
iol in a * Sketch of the Flora of Georgia," 1824, enumerating 
twenty-six tps adds to those already known, a variety of falcata Michx. 
(var. pagodefo 
Chamisso ak Schlechtendal, 1830, in **Linnea," v., described some 
new Mexican oaks from specimens collected by Schiede and Deppe: Q. 
calophylla, polymorpha, ao germana and oleoides, the latter being 
Q. virens Ait. These make the western species amount to thirty-six. 
Hooker and Arnott published y 1841, the ** Botany of Capt. Beechey's 
Voyage," comprising the plants which Lay and Collie, 1825-28, collected. 
We find amongst them three oaks, two Californian: Douglasii and densi- 
flora, and one Mexican: aristata. In ** Hooker's Flora boreali Americana,” 
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