ORDER 34. SDIARUBACE^E. 71 



fi. fntHcomnH. Shrub ; Ivs. ovate-oblong, scarcely pointed ; ovaries 2. 8. 

 & Z. Florldainim N. Safin-wood. Unarmed ; Ifts. 57, 9 ovate-lanceolate, t el- 

 liptical, obtuse ; fls. minute ; carp. 12, 1-seeded, obovoid. S. Fla. 



4. PTELE A, L. SHRUB TREFOIL. (IlreXea, the elm-tree ; from the 

 resemblance of the fruits.) 9 5 <5 . Sepals 3 to 6, mostly 4, much shorter 

 than the spreading petals. <5 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-seecled samara, with a broad, orbicular margin. J> Lvs 

 3-5-foliate. Fls. cymous. 



1 P. trifollata L. Lvs. 3-foliate, Ifts. sessile, ovate, short-acumiuate, lateral one:* in 

 equilateral, terminal ones cnneate at base ; cymes corymbous ; stam. mostly 4 ; style 

 short. Rocky places, N. Y. S. and W. 6 8f. Fls. white, odorous. June. 

 /3. main.*. Young branches, petioles and leaves beneath, soft-downy and hoary. S 



9 P. Baldvvinll T. & G. Lvs. glabrous, very small ; Ifts. sessile, c^al, obtuse ; ptam 

 4 : stig. sessile. E. Fla. If. Branches numerous and scraggy. Lv*. I'. 



ORDER XXXII. AURANTIACE^E. ORANGEWORTS. 



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

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

 5-merout' Stamens with flat filaments, distinct or cohering in one or sev- 

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

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

 Cotyledon thick. Figs. 37, 363. 



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

 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. Beny 9-18-celled. 5 5 A noble E. Indian genus 

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



1 C. vulgarls Risso. Bitter Orange. Petiole winded ; Ivs. elliptical, acute, crenu 



late ; stain. 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 ; sta. 20; fr. globous, with a thin rind and sweet pulp. 30f. 



3 C. LIMETTA. Lime. Petioles not at all win-red: 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 ; s ta. 33 ; fr. oblong-spheroid, 



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



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



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



ORDER XXXIV. SIMARUBACE^E. QUASSIAWORTS. 



Trees 01 shrubs with bitter bark, alternate, exstipulate, pinnate leaves, 

 and small, diclinous, regular, hypogynous 3-5-merous flowere. 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 



