PART FOURTH. 



DESCBIPTIVE BOTANY, OK PHYTOLOGY, 



COMPRISING A TABULAR FLORA OB 



THE UNITED STATES AND CANADA 



(WITHIN THE LIMITS STATED IN THE PREFACE). 



SUB-KINGDOM, PHJENOGAMIA, the Flowering Plants, hav- 

 ing stamens and pistils, producing seeds with an embryo. (For 

 sub-kingdom Cryptogamia, see page 360.) 



PROVINCE, EXOGENJE, the Dicotyledonous Plants. Stems 

 composed of bark, wood, and pith, exogenous ( 405) in 

 growth. Leaves mostly net-veined. Flowers 5-parted or 4- 

 parted, rarely in 3s. Embryo with 2 or more opposite 

 cotyledons. (Province Endogenae, p. 316.) 

 CLASS I, ANGIOSPERM^E. Pistils complete, with stigma 

 and ovary, the latter enclosing the ovules, and in fruit en- 

 closing the seeds. Cotyledons only 2. (Class II, Gym- 

 nospermaB, p. 311.) 



COHORT 1, DIALYPETALJE, the Polypetalous Exogens. 

 Flowers having a double perianth, both calyx and corollaj 

 the latter composed of distinct petals. (Cohort 2, p. 144.) 



ORDER I. RANUNCULACE^E. CROWFOOTS. 



Herbs (or woody climbers) with a colorless, acrid juice. Leaves mostly 

 divided, exstipulate, with half-clasping petioles. Sepals 3-15, green or peta- 

 loid. Petals 3-15, distinct, sometimes irregular or none. Stamens hypogy- 

 nous, indefinite. Ovaries many or few, distinct, 1 oo-ovuled. Fruit eithei 



