ANALYSIS OF THE NATURAL ORDERS, 



FOUNDED UPON THE MOST OBVIOUS OR ARTIFICIAL CHARACTERS, DE- 



8IQNKD AB A KEY FOR THE READY DETERMINATION OF ANY PLANT, 



NATIVE, NATURALIZED OR CULTIVATED, GROWING WITHIN 



THE LIMITS OF THIS FLORA. 



PROVINCES, CLASSES AND COHORTS. 



SoB-KiNODOM I. Phaenogamia or Flowering Plants. (Peovinob.) 

 Pkovinoe 1. Bark, wood and pith distinct, tiio two former 

 as concentric layers around the latter. Leaves net-veined. 

 Flower, at least, never cojtvpUtdy Z-merous, its parts mostly 



in 4s and 5s. DICOTYLEDONS or EXOGENS. (Ci,Aas.) 



Class 1. Flowers with stigmas, and pistils enclosing the 

 ovules, becoming seed-vessels enclosing the seeds. AN6I0SPEEMS. (Cohokt.) 

 CoHOKT 1. Corolla with the petals distinct. POLYPETALOUS. (A) 



CoHOET 2. Corolla with the petals united. GAMOPETALOUS. (B) 



Cohorts. Corolla (and often the calyx, also,) wantmg. APETALOTJS. (C) 

 CI.ASS 2. Flowers with open scales instead of pistils (or no 

 pistils at aU), the ovules naked. (Pine, Cedar, Fir, Yew, 



Cypress, etc.) GYMNOSPEEMS. (Cohokt.) 



CoHonT i. The cone-bearing plants (same as Class 2). CONOIDE^E. (D) 



Peovinob 2. Bark, wood and pith commingled. Los. parallel- 

 veined (rarely netted). Fls. 3-merout. MONOCOTYLEDONS or ENDOGENS. 

 Class 3. Fls. with no glumes. PETALIFEE^ or AGLUMACEOUS. (Cohobt.j 

 CoHoET 5. Fls. on a spadix, apetalous or incomplete. SPADICIFLOEjE. (E) 

 CoHOBT 6. Flowers complete, with a double perianth. FLOEIDEjE. (F i 



Class i. Flowers invested with green, alternate glumes 

 instead of the perianth which is wanting or minute. GLUMIFEE^E. (Cohokt). 

 CoHOET 7. The Grasses and Sedges (same as Class 4). GEAMINOIDE.iE. (G) 

 BoB-KiNonoM II. Cryptogamia, or Flowerless Plants. (Peovisoe.) 

 Peovinob 1. With stem and leaves distinguishable, and 



containing woody tissue and vessels. ACEOGENS or ANGIOSPOE^. (H) 



Peovince 2. With a thallus, often etem-like, but contain- 

 ing ceUular tissue only. THALLOGENS or GYMNOSPOE^. (K) 



A Cohort 1. POLYPETALOUS. 



* Herbs with the leaves alternate or all radical (11). 



* Herbs with the leaves opposite on the stem (7). 



* Shrubs, trees or undershrubs. — Flowers regular or nearly so. (3) 



— Flowers u-regular (or fruit a legume), (r) 

 2 Polyandrous, — stamens 3 to 10 times as many as the petals, or more. (3) 

 2 Oligandrous, — stamens 1 — 2 times as many as the petals or fewer. (4) 

 3 Leaves opposite, (s) 



3 Leaves altemate.^^tamen on the receptacle or the hypogynous corolla, (t) 

 — Stamens and petals on the calyx-tube, (v) 



