Part 3, 1911] RUTACEAE 213 



Sepals 4, persistent. Petals 4, spreading, somewhat unequal, imbricate in the bud. 

 Stamens 8, those opposite the petals shorter than the others; filaments inserted around the 

 base of the disk ; anthers oval or ovate. Ovary one-celled, globose, obovoid or oval, sessile, 

 seated on the flat, toothed disk. Ovules 2, collateral. Style lateral and nearly basal, 

 clavellate, curved; stigma capitate. Fruit sessile, globose or oval, 1-2-seeded ; exocarp 

 punctate. Seeds globose or subglobose ; testa crustaceous, dark-brown ; cotyledons oval, 

 somewhat fleshy; embryo curved. 



Type species, Pitavia dumosa Nutt. 



1. Cneoridium dumosum (Nutt.) Hook, f.; Baillon, Hist. 

 PI. 4: 498. 1873. 



Pitavia dumosa Nutt.; T. & G. Fl. N. Am. 1: 215. 1838. 



A strong-scented, much-branched, glabrous shrub, 5-15 dm. tall ; leaves spatulate- 

 linear or oblong-linear, 15-2S mm. long, 2-4 mm. broad, sessile, entire or obscurely crenu- 

 late, rather thick, rounded at the apex, pungent in taste; leaf-margin punctate; sepals 

 narrowly ovate to broadly ovate or oval, 1 mm. long ; petals white, ovate to oval or obovate, 

 5-6 mm. long; fruit 5-6 mm. broad, glabrous, reddish-brown. 



Type locality : San Diego. California. 



Distribution: Southern California, Arizona (?), and northern Lower California. 



Illustrations : E. & P. Nat. Pfl. 3* : /. 72, O-R. 



20. SARGENTIA S. Wats. Proc. Am. Acad. 25 : 144. 1890. 



Evergreen trees or shrubs with edible fruits. Leaves alternate, digitately several- 

 foliolate, rarely unifoliolate ; leaflets entire, coriaceous, pellucid-punctate, sessile or short- 

 petioluled. Flowers perfect, or the ovary sometimes abortive. Calyx small ; sepals 5. 

 Petals 5, spreading. Stamens 5, inserted at the base of the thick, lobed disk. Ovary 

 deeply 5-lobed, 5-celled, mostly immersed in the disk ; style slender ; stigma small, entire. 

 Ovules 2 in each cell. Fruit 2-lobed and 2-celled, or 1-celled ; exocarp fleshy; endocarp 

 thin, crustaceous. Seed solitary, without endosperm ; cotyledons flat, thick. 



Type species, Sargentia GreggiiS. Wats. 



1. Sargentia Greggii S. Wats. Proc. Am. Acad. 25 : 144. 1890. 



A large shrub, or tree attaining a height of 13 m. or more, with a smooth gray bark, 

 peeling off in thin plates much as in Phi/anus /leaves 2-3-foliolate ; leaflets oblong-obovate, 

 obovate or elliptic, 3-9 cm. long, 1.5-5 cm. broad, obtuse or acutish at the apex, cuneate or 

 somewhat rounded at the base, occasionally narrowly and partially decurrent on the petiolule, 

 minutely puberulent on the nerves beneath ; inflorescence terminal, tomentulose ; flowers 

 whitish ; petals oval, ovate, or obovate, 3.5-4.5 mm. long, 2.5-3 mm. broad ; sepals ovate 

 or oval, ciliate ; filaments subulate, the anthers ovate or oval ; drupe oblong-obovoid, 15-1S 

 mm. long, yellow; seed ellipsoid, brown, 12-14 mm. long, 6-7 mm. broad. 



Type locality : Near Monterey, Nuevo Leon. 



Distribution : Mexico. 



Illustration: E. & P. Nat. Pfl. 3 4 :/. 102, E-G. 



21. CASIMIROA Llave & Lex. Nov. Veg. Descr. 2 : 2. 1825. 



Evergreen trees or shrubs often with edible fruits. Leaves alternate, digitately several- 

 foliolate or unifoliolate, the leaflets entire or occasionally irregularly crenate, coriaceous, 

 usually pellucid-punctate ; the lateral ones sessile or short-petiolulate, sometimes decur- 

 rent on the petiole. Flowers small, perfect, or the ovary sometimes abortive. Sepals 4-6, 

 usually 5. Petals 4-6, mostly 5. Stamens as many as the petals, inserted on the base of 

 the disk ; filaments subulate or linear-lanceolate ; anthers elliptic, ovate, or oval. Ovary sub- 

 globose or obovoid, 2-8-celled, commonly 4-5-celled and usually 5-lobed ; stigma 5-lobed 

 or entire. Ovules solitary in each cell. Drupe 2-5-celled and 2-5-seeded. Seeds oblong, 

 oblong-obovate, or oval. 



Type species, Casimiroa edulis Llave & Lex. 



