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THE NEW STUDENT'S REFERENCE WORK

II. PLANT LIFE.

(1) Kinds:      73     (Anglo- < sperms).

1. VARIETIES OF  PLANTS:

a. Flowering plants that reproduce themselves by enclosed seed:

f (a) Trees:   woody stem, single 1940; •               trunks grow at least 20 feet

tall,  oak   1367;   maple   1166;

apple 95.

(b)  Shrubs or bushes:   woody stem—•

not a single main trunk, rose 1633; briar 1855.

(c)  Vines:    woody,   slender   climbing

stem, grape 794; ivy 950; pea 1432; Virginia creeper 2035; morning-glory 1263; clematis 407.

(d)  Herbs:    plants   with   stems   not

woody, dying down to the ground each year, beets 1845; grass 795; grains 2073; strawberries 1837; mustard 1292; mint 1237; saxifrage 1685.

b. Flowerless plants that reproduce themselves by exposed seed:

(a)  Evergreens   of   temperate   zone:

conifers 443; pine 1491; cedar 354.

(b)  Cycads of tropics:    492.

(c) Ginkgo—maidenhair tree:   767.

(d) Gnetums of the deserts:   818.

c. Flowerless plants reproduced by means of spores instead of seeds:

(a)  Ferns:    common    forms    of    the

woods 656.

(b)  Mosses:     bare — soil-moss    12S2;

hair-moss 1270; hepatica 865; peat 1436; 1125.

(c)  Lichens:    gray growths on fence-

boards and rocks 1859.

(d)  Algae:     sea-weeds and slimes on

surface of ponds 48; 392; 904; 491; 1463; 1609; 522.

(e)  Fungi:     moulds — yeasts    2121;

mushrooms 1284;   grain smut

227; 1479; 178;   17; 1949; 1678; 1420.

(f)  Bacteria:    154 plants  that cannot

be seen with the naked eye—-smaller than  the  finest  dust L               657; 761; 1633.

(2) How reproduced:    by means of spores 1803; 1601; 1796; 117; 1804;   661.

2. MEANS OF REPRODUCTION:

a. Flowers — fitted to produce seed:

(1) Kinds:    818    (Gymno-sperms).

(1) Kinds:    1897.

(1) Parts:    686.

(2) Forms:    925.

(a)  Stamens:    produce pollen 180S.

(b)  Stigma:    receives pollen 686.

(c)  Calyx:    floral display 312.

(d)  Corolla:    459.

(a)  Single.

(b)  Clusters.

2223