214 NORTH AMERICAN FLORA [VOLUME 25 



Leaves velvet\'-pubescent beneath. 



A small tree (shrub?) 2 m. or so in height ; leaves 3-foliolate ; petioles 2-3 



em. long. 1. C. pubescens. 



A tree up to 15 m. or more in height ; leaves usually 5-foliolate ; petioles 3-12 

 em. long. 2. C. tetramei in. 



Leaves not velvety-pubescent beneath. 



Drupes 5-10 em. broad ; petals oblong to ovate or oval. 



Lateral leaflets with petiolules 0.5-2 em. long. 3. C. edulis. 



Lateral leaflets sessile. 4. C. Walsonii. 



Drupes 1.2-1.8 cm. broad ; petals narrowly-oblanceolate to oblanceolate. 5. C. Pringlei. 



1. Casimiroa pubescens Ramirez, Anal. Inst. Med. 

 Nac. 2 : 19. 1896. 

 A small tree about 2 m. in height, with pubescent branchlets ; petioles thick, 2-3 cm. 

 long, enlarged at the base, pubescent ; leaves digitately 3-foliolate ; lateral leaflets ovate- 

 oblong to oval, almost always unequal, the petiolules 4-5 mm. long, the terminal leaflet 

 larger, 5.5-6.5 cm. long, 2-2.5 cm. broad ; all subcoriaceous, entire, the margin slightly re- 

 curved, ciliate, velvety-pubescent beneath, the upper surface pubescent, especially on the 

 nerves, the apex rounded or somewhat truncate or emarginate, the base cuneiform ; drupe 

 depressed-globose, 4 cm. in diameter, 2.5 cm. high, velvety-woolly, its pulp white. 



Type locality : Mexico. 

 Distribution : Mexico. 

 Illustration : Ramirez, loc. cit. pi. 5. 



2. Casimiroa tetrameria Millsp. Field Columb. Mus. 

 Publ. Bot. 1 : 401. 1898. 



A tree, attaining a height of 6-15 m. or more; petioles 3-12 cm. long, velvety, or in 

 age, nearly glabrous ; leaves digitately 3- or 5-foliolate, the lateral leaflets petioluled or sub- 

 sessile, occasionally bearing a small lateral lobe near the base, lanceolate to elliptic or oval, 

 sometimes oblanceolate or obovate, 3.5-16 cm. long, 2-8 cm. broad, acuminate or obtuse 

 and retuse at the apex, cuneate or rounded at the base, finely pubescent or sometimes 

 velvety above, velvety beneath, the margin entire or obscurely crenate, often ciliate ; in- 

 florescence 2-13.5 cm. long, the branches finely pubescent ; sepals triangular to broadly 

 triangular or somewhat rounded ; petals oblong-lanceolate to ovate, occasionally somewhat 

 obovate, 3.5 mm. long, 1-2.5 mm. broad. 



Type locality : Xcholae, Yucatan. 



Distribution : Yucatan to Costa Rica. 



3. Casimiroa edulis Llave & Lex. Nov. Veg. Descr. 2:2. 1825. 



Zanlhoxylum bombadfolium A. Rich. Ess. Fl. Cuba 329. 1842. 

 ? Casimiroa Sapoia Oerst. Vidensk. Meddel. 1857: 187. 1857. 

 Zanlhoxylum araliaceum Turcz. Hull. Soc. Nat. Mosc. 32i : 274. 1859. 

 Fagara bombacifolia Krug & Urban ; Urban, Bot. Jahrb. 21 : 567. 1896. 



A large or medium-size tree, sometimes cultivated for its edible fruit ; petioles 2.5-9 

 cm. long, puberuleut ; leaves digitately 3-7-foliolate, the leaflets ovate, ovate-oblong, 

 lanceolate or sometimes obovate, 4.5-12 cm. long, 1.7-5.5 cm. broad, obtuse or retuse at 

 the apex, cuneate at the base, glabrous or sometimes rninutely puberulous above, densely 

 papillose and more or less puberuleut, especially on the midrib and veins, beneath, coriaceous, 

 petioluled, the margin entire or obscurely crenate ; inflorescence terminal or axillary ; 

 sepals triangular, ciliate; petals greenish, lanceolate to oblong-ovate, ovate, or oval, 4-5 

 mm. long, 2-2.5 mm. broad ; drupe greenish-yellow, subglobose, 8-10 cm. in diameter, 

 pubescent; seeds 1.8-2.3 cm. long, 1-1.5 cm. broad; cotyledons ovate. 



Type locality : Mexico. 



Distribution : Mexico, Guatemala, and Nicaragua ; Cuba (cultivated ?). 



Illustrations: Seem. Bot. Voy. Herald />/. 51,52; Ramirez & Altamirano, Mat. Med. Mex. 

 2: opp. 113; Sagra, Hist. Cuba 10 : pi. 35 (poor) ; Card. Chron. II. 8 : /. 91; E. & P. Nat. Pfl. 3>: 

 / 102, A-D. 



4. Casimiroa Watsonii Engler (in E. & P. Nat. 

 Pfl. 3* : 178, hyponym. 1896), sp. nov. 

 A shrub? with puberuleut branchlets ; petioles 2-5.5 cm. long, somewhat pubescent, the 

 hairs short ; leaves digitately 3- or 4-foliolate, the lateral leaflets sessile and sometimes decur- 



