ANALYSIS OF THE NATURAL ORDERS. 



Founded on the most obvious or artificial characters : designed as a key for 



the determination of the Order of any plant, native, or naturalized, 



or cultivated, growing within the limits of this Flora. 



KINGDOM. 



Sub-kingdom I. Flowering Plants PHANEBOGAMIA. 



Class 1. Leaves net-veined. Flowers never completely 3-parted 

 (mostly ~ty and ^). Embryo with 2 cotyledons. Wood (if 

 any) in annual circles. Seed in a vessel. Stigmas pres- 

 ent ANGIOSPERMS, DICOTYLEDONES. 



Cohort 1. (A) Calyx and corolla present, petals separate Polypetalw. 



Cohort 2. (B) Calyx and corolla present, petals more or less united. .Gamopetalae. 



Cohort 3. (C) Calyx present, but no corolla, or both wanting Apetalae. 



Class 2. Stigma wanting. Seed naked. Embryo with two or more 



cotyledons GYMNOSPERMS- 



Cohort 4. (D) Cone-bearing plants (Pines, etc.) Coniferee. 



Class 3. Leaves parallel- veined (rarely netted). Flowers 3-parted. 

 Bark, wood, and pith commingled. Embryo with but one 



cotyledon. Root not axial MONOCOTYLEDONES. 



Cohort 5. (E) Flowers on a spadix Spadiciflorae. 



Cohort 6. (F) Floral envelope in two 3-parted whorls, outer 



one green (Lillies, etc.) Petaloidee. 



Cohort 7. (G) Floral envelope, chaff-like (Grasses and Grains) Glumiferse. 



Sub-kingdom II. Flowerless Plants CRYPTOG AMIA. 



Class 1. Vascular Cryptogams (Ferns, and their allies) PTERIDOPHYTA. 



Cohort 1. (H) Stem, herbaceous, rooting, or tree-like Llcopodinse. 



Cohort 2. (I) Stem, stiff, channeled (Rushes) Equisetaceee. 



Cohort 3. (J) Stem a creeping Rhizome or erect leaves pin- 



ni-veined, veins forked (Ferns proper) Filicinee* 



A. COHORT I. POLYPETALOUS DICOTYLEDONES. 



* Herbs with the leaves alternate or all radical. .(12) 



* Herbs with the leaves opposite on the stem. .(9) 



* Shrubs, trees, or undershrubs . . (2) 



2 Flowers regular or nearly so . . (8) 



8 Flowers irregular (or the fruit a legume) ( 165). .(/) 



3 Polyandrous, stamens 310 times as many as the petals.. (4) 



3 Oligandrous, stamens 12 times as many as the petals or fewer. .(6) 



