STANDLEY — TREES AND SHRUBS OF MEXICO. 679 



1. Euonymus mexicanus Benth. PI. Hartw. 36. 1840. 

 Type from mountains near Huasca, Hidalgo. 



" Branches smooth, 4-costate ; leaves short-petiolate, lanceolate, shallowly 

 crenulate, thickish (persistent ?) ; peduncles 1 to 3-flowered ; petals orbicular. 

 — Shrub 2.4 to 3 meters high ; leaves usually complicate, recurved, the margin 

 undulate. Similar to E. amerwanus, but the crenations of the leaves more 

 obtuse, the flowers smaller and usually 4-parted." 



2. Euonymus acuminatus Benth. PI. Hartw. 59. 1840. 

 Type from Llano Verde, Oaxaca. 



" Branches smooth ; leaves ovate-lanceolate or oblong, obtusely acuminate, 

 lightly crenate ; peduncles 3 to 5-flowered ; petals suborbicular ; capsule ver- 

 rucose (?). — Shrub 1.8 to 3 meters high, related to E. americanus, but the 

 leaves broader at base and more conspicuously acuminate at apex, the peduncles 

 longer, and the flowers much larger and more numerous." 



5. PACHYSTIMA Raf. Amer. Month. Mag. 2: 176. 1818. 



Only one other species is known, a native of the mountains of Virginia and 

 West Virginia. 

 1. Pachystima myrsinites (Pursh) Raf. Fl. Tellur. 42. 1838. 



Ilex myrsinites Pursh, Fl. Amer. Sept. 119. 1S14. 



A single Mexican specimen seen, from the Sierra Madre south of Saltillo, 

 Coahuila. The species ranges through the Rocky Mountains and westward to 

 California and British Columbia. 



Low shrub, sometimes prostrate; leaves opposite, persistent, oval to oblong 

 or elliptic, 1 to 3 cm. long, dentate, glabrous, short-petiolate ; flowers solitary 

 or clustered in the leaf axils, green, minute ; sepals 4 ; petals 4 ; fruit a capsule. 



The Mexican specimens are noteworthy for their small leaves, and may rep- 

 resent a distinct species. They come from a locality far distant from any other 

 station known for the species. 



6. CELASTRUS L. Sp. PI. 196. 1753. 



Shrubs or small trees, usually scandent ; leaves alternate, deciduous, short- 

 petiolate ; flowers small, usually 5-parted ; stamens 5 ; capsule 3 or 4-celled, 

 loculicidally deliiscent ; seeds 2 in each cell, inclosed in an aril. 



Leaves serrulate; capsule 3-celled 1. C. pringlei. 



Leaves entire ; capsule 4-celled 2. C. tetramerus. 



1. Celastrus pringlei Rose, Contr. U. S. Nat. Herb. 5: 195. 1899. 



Morelos ; type from Cuernavaca. 



Scandent shrub, 6 meters long, glabrous throughout; leaves short-petiolate, 

 narrowly lance-oblong, 7 to 10 cm. long, acute ; flowers in axillary racemes 2.5 

 to 5 cm. long ; sepals 5 ; petals 5, white ; capsule terete, obovoid, 12 mm. long ; 

 seeds each covered with a yellow aril. 



3. Celastrus tetramerus Standi., sp. nov. 



Vicinity of Iguala, Guerrero (type, Pringle 10319; U. S. Nat. Herb. no. 462573). 



Small tree, glabrous ; petioles about 5 mm. long ; leaf blades lance-oblong, 8 

 to 11 cm. long, 2.5 to 3.5 cm. wide, acuminate, acute at base, thin, entire, paler 

 beneath ; flowers axillary, fasciculate or in short racemes, the pedicels in fruit 

 about 1 cm. long; calyx 4-lobate, the lobes obtuse; fruit globose or depressed- 

 globose, 8 mm. broad, 4-celled ; stigma 4-lobate. 



DOUBTFUL SPECIES. 

 Celastkus mexicanus DC. Prodr. 2: 8. 1825. Described from Mexico, the de- 

 scription based upon one of Sess6 and Mocifio's drawings. 



