^^««- ANACARDIACE.E. inn 



tlie edge of the disk, somewhat withering- persistent. Stamens 8 or 10, inserted at 

 the sinuses of the disk, shorter than the calyx : fdaments subulate, persistent : 

 anthers didymous. Ovary one-celled, of a single ovoid carr)e], with style extremely 

 short or none, and a depressed entire or obscurely 2-Iobcd stigma. Ovules 2, col- 

 lateral or nearly so, inserted on the ventral suture barely above the base of the cell, 

 ascending, obovate, anatropous. Fruit a firm-coriaceous follicle, ovoid, oblique^ 

 acute, many-striate, opening down tlie ventral suture, 1 - 2-seeded. Seed obovate,' 

 compressed, with a smooth crustaceous testa, in whicli on both sides is a small 

 bulging empty cavity ; a small arillus or caruncle at the hilum. Embryo or oven 

 well-fillod nucleus not seen. — Low and rigid shrubs {of the interior arid region) ; 

 with slender spinescent branches, and small alternate simple and entire leaves, which 

 separate in age by an indistinct articulation from a dilated scale-like minutely 

 2-stipulate base ; the stipules adnate to the scale and setaceous-subulate ; flowers 

 small, solitary, terminating short axillary branches or spur-like fascicles: petals 

 white, — n. Wright, ii. 29, t. 12, & Proc. Am. Acad. xi. 73. 



1. G. Nevadense, Gray, 1. c. Two or three feet high, much branched, pale or 

 slightly hoary with almost imperceptible pubescence : leaves oval, half an inch or 

 less in length, with short petiole abruptly terminating in the retuse broad stipulifer- 

 ous scale : calyx- lobes and petals 4 : stamens 8. 



Dry hills, Washoe Co, Nevada, Lcmmon and Case, 1875. An interesting acquisition. 



G. sriNESCENS, Gray, the only other species, of New Mexico and Southern Utah, is smooth, 

 has smaller and narrower leaves and mostly 5-merous flowers. 



Order XXX. ANACARDIACE^. 



^ Shrubs or trees (largely tropical or subtropical), with a resinous and usually acrid 

 juice, alternate leaves (either simple or compound) without stipules and almost 

 always not pellucid-punctate, and small regular flowers commonly polygamous or 

 dioecious ; the stamens as many or twice as many as the petals ; the free ovary in 

 the genuine representatives of the order 1 -colled and 1-ovulod, but the stylos often 

 3 ; the fruit drupaceous ; and the seed without albumen. 



iT.^f^^T. °/'^^'' ""f "^""11 ^? ge"e''a>/n^ 450 species, represented in California, as in the Atlantic 

 United States, only by the large and polymorphous genus Rhus. 



rpn^orllfw r^^r ''''''''• "^^-J^^ ^^'}^'^^ ^l*'^>"^°' '■«"?i"g *« ^^^ Valley of the Rio Grande, is 

 reported by Dr. Cooper as from San Diego. It is a smafl tree, with pinnate leaves ; leaflets 5 to 

 10 pairs on a somewhat winged rhachis, oblong-obovate or cuneate, glabrate, half an inch long ; 

 flowers dicEcious, without petals, in axillary or paniculate spikes ; stamens 5 ; fruit smooth, 2 

 lines in diameter, somewhat compressed. 



ScniNUS Moi,i.E, Linn., a native of Mexico and South America, is common as a cultivated 

 ornamental .shrub in (ho southern part of the State, under tlio name of Pepper-tree or Chili 

 repper It is an eyern;reen tree of moderate size, and very graceful liabit ; leaves with 20 or more 



and 10 starnetis; drupes numerous, as large as a small pen," strongly puugenr; sml suspended 

 above the middle of the cell, instead of from a basal stalk as in most genera. The apparently 

 of the leaves when placed in water are due to the bursting of the resinif- 



r>^;'..= „f 1 rV ~i -f^-"' ;;■-- "■ — '"'<-><ii-c =>i.cc, .mu very graceful habit ; leaves with 20 or more 



pai s of lanceolate leaflets ; flowers small and dicEcious, in large panicles, having 5 greenish petals 



and 10 stamens; drupcr -- ' " ■ ■ " t> . r - . 



above the middle of the 



spontaneous movements ot the leaves when placed in water are due to the bursting 



erous glands with which they abound. 



1. RHUS, T,inn. 

 Sepals and petals (4 to 9) usually 5. Stamens as many or twice as many, with 

 subulate filaments, inserted under the edge of a disk lining the base of the calyx. 

 Fruit a small dry drupe. Seed pendulous upon a slender seed-stalk arising from 



