DESCRIPTIVE BOTANY. 



DICOTYLED'ONJE. 



Trunk consisting of bark, wood, and pith distinct, more or 

 less conical, increasing by an annual deposit of new wood and 

 cortical substance between the wood and bark. Leaves attached 

 to the stem by articulation ; their veins, and those of the floral 

 envelopes, reticulated. Embryo with two or more opposite 

 cotyledons. 



(The student will readily distingnisli the plants of this class hy the reticulated veins 

 of the leaves, sepals, and petals; by the presence of bark and pith. It includes all 

 our shrubs and forest trees.) 



POLYPET'AL^. 



Flowers generally consist of calyx and corolla ; calyx cod 

 sisting of several distinct sepals. Petals several, distinct, hj 

 pogynous, rarely united, sometimes wanting. 



Order L— RANUNCULA'CE^. {Crow-foot Family) 



Sepals 3 — 15, usually 5, mostly deciduous. -Estivation 

 imbricate (except Clematis, which is valvate). Petals 3 — 15 

 or none. Anthers adnate. Carpels numerous, distinct, or uni- 

 ted into a single pistil. Seeds anatropous, erect, or pendulous. 

 Embryo minute. Albumen large, corneous, or fleshy. Plants 

 generally with acrid, transparent juice. 



ANALYSIS. 



1. Vines Clematis, 1 



Not vines 2 



2. Fruit achenia 3 



Fruit a capsule, pod, or berry 9 



3. Petals none. Perianth petal-like 4 



Petals present 6 



4. Involucre separate fi-om the flower, leaf-like 5 



Involucre calyx-like 7 



5. Achenia ribbed, grooved, or inflated Thalictrum, 15 



Achenia not ribbed or inflated Anemonf, 2 



