ORDER 34. SIMARUBACE^E. 71 



/3. fruticoiium. Shrub ; Ivs. ova to- oblong, scarcely pointed ; ovaries 2. S. 

 3 Z. Floridanum N. Satin-wood. Unarmed ; li'ts. 57, $ ovate-lanceolate. $ A 

 liptical, obtuse ; fls. minute ; carp. 1 2, 1-eeeded, obovoid. S. Fla. 



4. PTELEA, L. SHKUB TREFOIL. (ZZreAe'o:, the elm-tree ; from tin 

 resemblance of the fruits.) 9 5 <5 . Sepals 3 to C, mostly 4, much short?) 

 than the spreading petals. <$ Stamens longer than the petals and alternate 

 with them, very short and imperfect in ? . Ovary of 2 united carpels. Stig 

 2. Fruit 2-celled, 2-seeded samara}, with a broad, orbicular margin. 5 Lv 

 3-5-foliate. Fls. cymous. 



1 P. trir<>lia.ta L. Lvs. 3-foliate, His. sessile, ovate, short-acuminate, lateral ones in 



equilateral, terminal ones cuneate at base ; cymes corymbous ; stam. mostly 4 ; styl* 

 short. Rocky places, N. Y. S. and W. 6 Sf. Fls. white, odorous. June. 

 /3. mollis. Young branches, petioles and leaves beneath, soft-downy and hoary, fe 



2 I". Baldwin!! T. & G. Lvs. glabrous, very small ; Ifts. sessile, c^al, obtuse ; stam 



4 ; stig. sessile. E. Fla. If. Branches numerous and scraggy. Lvs. 1'. 



ORDER XXXII. AURANTIACE^E. ORANGEWORTS. 



Trees or s7irubs, glabrous, abounding in little transparent receptacles of 

 volatile oil, with leaves alternate, 1-3-folSate or pinnate. Flowers regular, 3 

 5-merous. Stamens with flat filaments, distinct or cohering in one or sev- 

 eral sets. Ovary compounded of several united carpels. Style. 1. Fruit 

 (hesperidkim) many-celled, pulpy, covered with a thick rind. Albumen 

 Cotyledon thick. Figs. 37, 363. 



CITRUS, L. (Kirpior, the citron ; the fruit of one of the species. 1 ) 

 Sepals and petals in 5's. Anthers 20, or some other and higher multiple of 

 5, versatile, the connectile articulated to the filament. Filaments dilated at 

 base, polyadelphous. Berry 9-18-celled. ^ J> A noble E. Indian genus 

 Lvs. 1-foliate, entire, evergreen. Petiole often winged. 



1 C. vulgarls Risso. Sitter Orange. Petiole winged ; Ivs. elliptical, acute, crenu 



late ; stam. 20 ; fruit globular, with a thin rind and bitter pulp. S. Fla. 15 20f. Asia. 



2 C. AURANTIUM. Sweet Orange. Petiole scarcely winged ; 1ft. oblong, acute, crenu- 



late ; sla. 20 ; fr. globous, with a thin rind and sweet pulp. SOf. 



3 C. LIMETTA. Lime. Petioles not at all winged; 1ft. ovate-orbicular, serrate; stam. 



30 ; fr. globous, with a sweet pulp, and a protuberance at top. 15f. 



4 C. LIMONUM. Lemon. Petioles somewhat winged ; sta. 35 ; fr. oblong-spheroid, 



with a thin rind and very acid pulp. 20f. Fr. yellow. 



5 C, DECUMANA. Shaddock. Petioles broadly winged ; 1ft. obtuse, emarginatc : fr 



very large, with a thick rind. 15f. Fruit green-yellow. 5' diam. 



ORDER XXXIV. SIMARUBACE^E. QUASSTAWORTS. 



Trees or shrubs with bitter bark, alternate, exstipulate,. pinnate leaves, 

 and small, diclinous, regular, hypogynous 3-5-merous flowers. Stamen* 

 as many or twice as many as the petals, inserted on the hypogynous disk. 

 Styles 2 5. Ovaries 2-5-lobed or carpelled. Fruit 1 5 one-seeded 

 drupes or samaras 



