AMERICAN OAKS.

QUERCUUM AMERICANARUM.

DISPOSITIO METHODICA. *

1. QUERCUS obtusiloba.

* WILLDENOW Sp. Plant. vol. 4. p. 423, &c. enumerates 76 species of oak-the arrangement differs more or less from that of MICHAUX's; as follows, noticing here only the North American species as observed and mentioned by Michaux.

+ foliis integerrimis, with leaves very entire.

1. Quercus Phellos. Willd.

maritima sericea

Quercus Phellos; sylvatica.

Michaux.

maritima,

pumila,

virens,

cinerea,

including the two varieties of Michaux. Quercus imbricaria,

virens cinerea

12.

laurifolia

13.

imbricaria

+++ foliis apice lobatis; with leaves lobed at their extremities.

45. Q. aquatica, Willd.

4.9.

50.

Q. aquatica,

- triloba,

nigra,

Michaux.

leaves sinuated, lobes brissled.
Q. aquatica varietas,
Michaux.

++++ foliis sinuatis lobis mucronatis;
hemisphærica, Willd.
elongata,

falcata (exclusis synonymis)

METHODICAL ARRANGEMENT

LEAVES
in

THE FULL GROWN TREE,

without

ariste, beards or awns, or

bristles.

OF

AMERICAN OAKS.

Fruit pedunculated.
Fructification annual,

(except sixth species>
which is biennial)

with

LEAVES
in

THE FULL GROWN TREE

bristly points.

Fruit almost sessile or

not quite destitute of a

peduncle, or fruit stalk.

Fructification biennial.

tinctoria,
discolor,

*1. a. obtusifolia, upland white oak, iron oak.

2. Q.

lobed or the

margins of the segments rounded.

* 4.

toothed, be-
set with pro-
jecting hori-
zontal rather
distant teeth
of its own
substance.

entire.

entire.

し

macrocarpa, over cup

white oak.

3. q. lyrata, water white oak. a. alba: pinnatifida, white

* Q.

oak.

white oak.

repanda, sinuated

prinus: palustris, swamps chesnut oak

-monticola; mountain ches

nut oak; rocky oak.

acuminata, narrow live

8. cinerea, upland willow oak.

9. imbricaria, shingles willow oak

10. q. laurifolia, swamp's willow oak.

-obtusloba.

* 11. aquatica, water oak.

12. q. nigra, black oak.

13. q. tinctoria; angulosa, great

black oak, Champlain black oak, Quercitron oak.

sinuosa, sinuated

Quercitron oak.

14. Q. triloba, downy black oak. 15. q. Banisteri, running downy or Banisters oak.

16. q. falcata, downy red oak. 17. q. Catesbæi, sandy red or Catesby's oak.

18. q. coccenia, scarlet oak.

19. q. palustris, swamp's red oak. *20. rubra, red oak.

tinctoria; angulosa,

51.

52.

53.

rubra,

ttttt foliis sinuatis, lobis muticis; leaves sinuated, lobes without bristles,

71. stellata,

Willd.

72.

lyrata,

73.

macrocarpa,

macrocarpa,

Numbers 1, 2, 3, &c. refer to the individual species in WILLDENOW.

* In the Botanical Garden, Glasnevin,

Michaux.

C