132 



LESSONS IN BOTANY 



ANALYSIS OF THE NATURAL ORDERS, 



Being a Key for the ready determination of any plap,t, native or cvltivated, 

 groviing mthin amy State east of the Mississippi rimer, or bordering on its 

 ■western shore. 



Note. — A star (♦) prefixed to the name of tbe Order, denotes tbal that Order, with ita 

 genera an^ speciee, is described in ita place in the Flora. The Orders not thus marked are 

 Qut noticed in tbe Flora beyond this Table. Tbe Orders are here numbered to correspond with 

 the " Glass BooIl of Botany.^* 



. CI -ASSES AND COHOBTS 



]■ Flowering Plimts .. . %. Sub-hitiydom, I'H/JiNOtiAMIA. 



1 FloweTless Plants Ferus, Mosses, Lichens, Miisliroonis, 



Sen-weeds, &o. (not, further noticed liere). Sub-kingdom, OKYPTOtr AMIA. 

 2. Leaves net-veined, i'lowers never completely 3-parted ...3. EXOGENS. 



2. Leaves parallel- veined (rarely net veined). Flowers 3-parted.... 4. ENDOQENS. 



8, Stigmas present. Seeds inclosed in a seed-vessel 5. Angiosperms. 



3. Stigmas none. "Seeds naked (Pines, Spruces, &o.).. .6. Gymnosparms. 



4 Flowers without glumes, colored. or green 7. Petaliferse 



4. Flowers with green, alternate glumes, no perianth 8. GlumiferiB 



5. Corolla with distinct petals A. GohoH\. Polypetalohs. 



5. Corolla with imited petals B. Cohort 2. Gamopktalous. 



5. Corolla none. Sepals sometimes none. .C. CoTiortZ. Apetalohs. 



6. The cone-fruited plants (same as Gymnoapernis). .D. Cohorts. Conoids. 



7. Fls. on a spadix, apetalous or incomplete E. Cohort 5, Spadioiflobj:. 



7. Fls. complete, perianth double. Nospadix..P. Cohort d. Fioeide^. 



8. The grass-like plants (same as Glumiferffi). G. Cohorts. Gbaminoids. 



A Orders of the Polypetaldus Exogens • 



1. Herbs.... 2. 



1. Shrabs, trees, or undersbrubs. .3. 



2. Leaves alternate or all radical 15. 



2. Leaves opposite on the stem. , . .11. 



3. Flowers regular or nearly so 4. 



S, Flowers irregular (or fruit a legume, § 180)* . .57 

 4. Stamens 3 times as many as tlic petals, or more. . 5. 

 4. Stamens 1 or 2 times as many as the petals, or fewer . 7. 



5> Leaves opposite 60. . 



5. Leaves alternate. . .6. 



