140 CALIFORNIA ACADEMY OF SCIENCES. 



Ehus aromatica Ait. var. indivisa Watson. — El Ranclio 

 Viejo. 



Rhus diversiloba Torr. & Gray. — Very abundant about 

 El Kosario and in a form resembling R. toxicodendron from 

 El Kancho Viejo. 



Rhus laurina Nutt. — San Jose de Gracia and northward. 



Veatchia discolor (Benth.). ScJiinus ? discolor Bentb. 

 Bot. Sulph. 11, t. ix; Walp. Rep., v. 413. Rhus Veatchii 

 Kell. Proc. Cal. Acad., ii, 24; Hesperian with plate, April, 

 1860; Engler, Monog. Burseracea3 59. Veatchia Cedrosensis 

 Gray., Bull. Cal. Acad., i, 4; Proc. Am. Acad., xx, 291; 

 Pittonia, i, 198, 201. Bursera pabescens Watson, Proc. 

 Am. Acad., xxiv, 44. Dioecious, arborescent. 10-25 feet in 

 height, 1-2 feet in diameter, with low tortuous widely- 

 spreading branches: leaves, pedicels, peduncles and young- 

 shoots appressed-pubescent, upper surface of the leaves 

 only sparsely so: leaves fascicled, imparipinnate, 1-3 inches 

 long, with 1-7 pairs of sessile leaflets, entire or variously 

 lobed, the upper ones often confluent with the 3-7 lobed 

 terminal one : panicles axillary and more or less terminal, 

 compound, often ample, when in full bloom completely 

 covering the nearly, at that time, leafless tree: inflorescence 

 short-hirsute, flowers 4 mm. long: sepals 5, concave, val- 

 vate: petals twice as long as the sepals, ovate-acute, some- 

 what accrescent, conduplicate, keeled by the strong mid- 

 nerve: stamens of the female flower minute, abortive: styles 

 3, capitate, indistinctly so in the male flower: ovary ob- 

 lique, flattened, pubescent; half-grown fruit red, nearly 

 equaling the petals: disk of five separate lobes, sometimes 

 crenate or deeply bilobed, sometimes oblong, entire, with 

 10 stamens alternately inserted in front and in the sinus, or 

 ten-crenate with all the stamens inserted into the intervals: 

 aestivation quincuncial. The forming fruit is thin-walled, 

 otherwise it resembles very much that of Rhus ovata. The 

 flowers are either bright pink or yellowish gray, but the 



