LINNAEAN ARRANGEMENT. 



Order 7. Polyandria. 



CERATOPHYLLUM. Flowers axillary, solitary, inconspicuous. Calyx 

 none, but an 8- to 10- or 12-cleft involucre. STAM. FL. Anthers 

 sessile. PISTILL. FL. Ovary 1-celled ; style filiform ; stigma simple. 

 Akene beaked. ORD. LXXXVII. CERATOPUYLLACEAE. p. 257. 



ARUM. Flowers naked, on a spadix, often dioicous. Spathe hooded 

 at summit. Spadix naked at summit. Stamens crowded, subverti- 

 cillate; anthers subsessile, 2- to 4-celled. Pistils below the stamens, 

 crowded. Berries 1- or several-seeded. ORD. XCIX. ARACEAE. 

 p. 297. 



PELTANDRA. Flowers naked, on a spadix. Spathe elongated, con- 

 volute. Spadix entirely covered with flowers. Anthers sessile, with 

 6 or 6 cells surrounding the margin of a thick peltate connective. 

 Pistils below the stamens. Berries 1- to 3-seeded. ORD. XCIX. 

 ARACEAE. p. 298. 



SAGITTARIA. Sepals 3, connected at base, persistent. Petals 8, 

 deciduous. PISTILLATE FLOWERS below ; ovaries numerous, in de- 

 pressed-globose heads, becoming flatted margined akenes. ORD. 

 CIII. ALISMACEAE. p. 305. 



JUGLANS. STAM. FL. Aments simple, lateral, from buds without 

 leaves. Calyx adnate to an entire 1-fiowered bract, 3- to 6-parted. 

 PISTILL. FL. terminal, solitary, or few and clustered. Calyx 4-cleft, 

 with 4 small petals alternating wjththe segments. Fruit drupaceous, 

 the epicarp somewhat fleshy, not opening; nut woody, rugose. 

 ORD. XCI. JUGLANDACEAE. p. 261. 



CARYA. STAM. FL. Aments mostly in threes, lateral, from buds 

 with leaves. Calyx adnate to an entire 1-flowered bract, 2- or 8- 

 parted. Stamens few ; anthers hairy. PISTILL. FL. terminal, in small 

 clusters. Calyx 4-cleft, without petals. Fruit drupaceous, the 

 epicarp coriaceous, opening by 4 valves ; nut bony, smooth, usually 

 4- to 6-angled. ORD. XCI. JUGLANDACEAE. p. 263. 



QUERCUS. STAM. FL. Aments simple, slender, without bracts. 

 Calyx mostly 5-parted. Corolla none. PISTILL. FL, in small clus- 

 ters, sometimes on a long common peduncle ; each flower with an 

 involucre formed of numerous little imbricated scales united into a 

 cup. Calyx 6-toothed. Corolla none. Nut, or Acorn, ovoid or 

 oblong, seated in the indurated involucre. ORD. XCII. CUPULI- 

 FERAE. p. 265. 



CASTANEA. STAM. FL. interruptedly clustered in long naked^ spike- 

 form aments. Calyx 5- or 6-parted. PISTILL. FL. usually in threes, 

 within ovoid squarrose clustered involucres. Calyx urceolate, the 

 limb 5- or 6-cleft. Nuts coriaceous, 1 to 3, inclosed in the globose 

 prickly involucre, which opens by 4 valves at maturity. ORD. XCII. 



CUPULIFERAE. p. 270. 



