5. Ptelea trifoliata, Linn. Sp. Pi. p. 173. 6. Ptelea, sp.

RUTACEiE.
171
Frutex vel arbor parva, dense ramosa, glaberrima. Folia petiolata, subopposita, trifoliolata (vel
interdum bifoliolata, foliolum alterum integrum alterum basi unilobatum), foliolis sessilibus
subcoriaceis, lanceolatis, obtusis vel interdum retusis, intermedio ad sesquipollicari, lateralibus
duplo triple- quadruplove brevioribus, creberrime prsecipue subtus nigro punctatis, supra nitidis.
Flores mimitissimi, tetrameri, breviter pedicellati, in cymas parvas terminales dispositi. Fructus
(unicus tantum visus) obovato-ellipticus, basi auriculatus.
NORTH MEXICO, near Carrizal, Nuevo Leon (Berlanäier,14AS±), Buen Vista (Gregg).
Hb. Kew.
3.
Ptelea pentandra, DC. Prodr. ii. p.
8 3 ; Calqnes des Dess. Fl. Mex. 2 0 1 .
SOUTH MEXICO, Guanaxuato (Hartweg), without locality (Mocino & Sesse).
4.
Ptelea podocarpa, DC. Prodr. ii. p.
Hb. Kew.
8 3 ; Caiques des Dess. Fl. Mex. 2 0 0 .
MEXICO, without locality (Mogino & Sesse).
5. Ptelea trifoliata, Linn. Sp. Pi. p. 1 7 3 .
Southern States of NORTH AMERICA, from Kentucky to—NORTH MEXICO, Fronteras,
Sonora (Torrey).
6. Ptelea, sp.
SOUTH MEXICO, Cordillera of Oaxaca, 6 0 0 0 feet (Galeotti, 7 1 6 9 ) .
Hb. Kew.
1 2 . CASIMIROA.
Casimiroa, Llave et Lex. Nov. Veg. Descr. £asc. ii. p. 2 ; Benth. et Hook. Gen. Plant, i. p. 302.
Limited to the two arboreous species here enumerated.
1.
Casimiroa edulis, Llave et Lex. Nov. Veg. Descr. ii. p.
2 ; Seem. Bot. Voy.
' Herald,' p. 2 7 3 , t. 5 1 & 5 2 .
Zanthoxylon araliaceum, Turcz.
NORTH MEXICO, frequent in the States of Cinaloa and Durango, both wild and cul-
tivated (Seemann, 2 1 3 7 ) ; SOUTH MEXICO, Zimapan (Coulter, 7 8 7 ) , Orizaba
1 0 0 8 ) ; GUATEMALA, near the city of Guatemala (S. Hayes).
Hb. Kew.
2.
(Botteri,
Casimiroa Sapota, 03rst. in Vidensk. Meddel. 1 8 5 7 .
NICARAGUA, Province of Segovia, in the vicinity of Chinotega, at 4 0 0 0 feet (CErsted).
Tribe AUBANTIEiE.
With the exception of the doubtful genus Stauranthus, this tribe (comprising twelve
genera and above sixty species) is limited to the Old World.
1 3 . STAURANTHUS.
Stauranthus, Liebm. in Vidensk, Meddel. 1853, p. 9 1 ; Benth. et Hook. Gen. Plant, i. p. 303.
The only species :—
z 2