logy.--Casino
& Co., Boston.

For identifying plants the following books may be mentioned:--

Green algae (exclusive of desmids, but including _Cyanophyceae_ and
_Volvocineae_).

WOLLE. Fresh-water Algae of the United States.--Bethlehem, Penn.

Desmids. WOLLE. Desmids of the United States.--Bethlehem, Penn.

The red and brown algae are partially described in FARLOW'S New England
Algae. Report of United States Fish Commission, 1879.--Washington.

The _Characeae_ are being described by Dr. F. F. ALLEN of New York. The
first part has appeared.

The literature of the fungi is much scattered. FARLOW and TRELEASE
have prepared a careful index of the American literature on the
subject.

Mosses. LESQUEREUX and JAMES. Mosses of North America.--Boston, Casino
& Co.

BARNES. Key to the Genera of Mosses.--Bull. Purdue School of Science,
1886.

Pteridophytes. UNDERWOOD. Our Native Ferns and their Allies.--Holt
& Co., New York.

Spermaphytes. GRAY. Manual of the Botany of the Northern United
States. 6th edition, 1890. This also includes the ferns, and the
liverworts.--New York, Ivison & Co.

COULTER. Botany of the Rocky Mountains.--New York, Ivison & Co.

CHAPMAN. Flora of the Southern United States.--New York, 1883.

WATSON. Botany of California.

INDEX.

_Acacia_, 209.

_Acer_, _-aceae_. See "Maple."

Acetic acid, 3, 59, 98, 138, 230.

_Achimenes_, 218.

_Acorus_. See "Sweet-flag."

Actinomorphic, 213.

Adder-tongue, 116; Fig. 70. See also "_Erythronium_."

_Adiantum_. See "Maiden-hair."

_Adlumia_. See "Mountain-fringe."

_AEsculinae_, 199.

_AEsculus_. See "Buckeye," "Horse-chestnut."

_Aggregatae_, 222.

Alcohol, 5, 31, 55, 83, 230, 233.

Algae, 4, 21.
green, 21.
red, 21, 49.
brown, 21, 41.

Alga-fungi. See "_Phycomycetes_."

_Alisma_, _-ceae_. See "Water-plantain."

_Allium_. See "Wild onion."

Amaranth, 185.

_Amarantus_, _-aceae_. See "Amaranth."

_Amoeba_, 7; Fig. 2.

_Ampelidae_. See "Vine."

_Ampelopsis_. See "Virginia creeper."

Anatomy, 3.
gross, Implements for study of, 3.
minute, Implements for study of, 3, 4.

Anatropous, 151.

_Andreaeaceae_, 99, 100.

Androecium, 148.

_Andromeda_, 211.

_Anemone_, 185.

_Angiocarpae_, 84.

Angiosperm, 129, 143, 145.

Aniline colors, 233.

_Anisocarpae_, 210, 213.

_Anonaceae_. See "Custard-apple."

Anther, 148, 175, 179.

Antheridium, 27, 36, 39, 45, 51, 59, 68, 89,