RUTACEÆ. 517 
cells 4-1 , 2-seriate descendent; micropyle extrorse superior. Fruit 
coriaceous, usually outwardly scarcely fleshy ; cocci 2-5, dry or sub- 
drupaceous (Huguaiacum), dorsally obtuse (Larrea), carimate or 
more or less wide-winged (Huguaiacum), sometimes dorsally mem- 
branous (Bu/nesia), glabrous, or more rarely villous (Larrea), 
finally separating from axis, indehiscent (Larrea), septicidal 
(Luguaiacum, Pintoa), or inwardly dehiscing (Porlieria, Bulnesia). 
Seeds usually solitary in cocci; testa thin; embryo axile (often 
green); cotyledons more or less elongated ; albumen fleshy, or more 
or less hard or corneous, outwardly smooth or slightly rimose 
(Luguaiacum).—Resinous or balsamic trees or shrubs, some spartioid 
(Bulnesia); wood often hard; branches nodose articulate; leaves 
opposite stipulate, pinnate, 2—» -foliolate ; folioles entire (sometimes 
sensitive) unsymmetrical at base ; flowers' solitary or cymose few, 
pedunculate lateral to leaves (Zrop. and Subtrop. Temp. and Mont. 
America). 
122? Plectrocarpa Gu.’—< Flowers often irregular; sepals 5, 
concave, imbricated. Petals 5, spathulate, unguiculate, slightly 
longer than calyx, open in æstivation. Stamens 10; filaments 
filiform or subulate, free at base or enlarged on both sides by sub- 
ulate squamules and scales fleshy fimbriate-lacerate stipate ; anthers 
oblong, introrsely rimose. Germen sessile densely villous, ovoid- _ 
5-agonal, 5-locular ; style subulate stigmatiferous at apex; ovules in 
each cell 2, descending, laterally inserted by funicle at middle of 
cell. Fruit villous subulate-5-agonal or rather terete; cocci 5, 
indehiscent, middle of back produced in subulate spur. Seed solitary 
in cells, descending compressed; albumen thin fleshy; embryo 
axile; cotyledons ovate foliaceous——A ramified shrub; branches 
terete spinose at nodes; spines strong straight, 4-partite; leaves 
fasciculate at nodes, imparipinnate; folioles oblong sericeous 
4, 5-jugate; flowers‘ solitary, pedunculate, erect between fascicles of 
leaves” (Mendoza’). 

1 Yellow, purple, or bluish, often large, i, 151 (Bulnesia), 153 (Pintoa); iii. 840; iv. 
handsome, 406 ; 481, 482 (Porlieria). 
? Spec. ad 18. Liypu., in Bot. Reg. (1539), 3 In Hook, Bot. Mise., iii. 166.—ENpDt., 
t. 9.—C. Gay, loc, cit., 471 (Larrea), 476  Gen., n. 6040.—B. H., Gen., 268, n. 15. 
(Porlieria)—A. Gray, Pl, Wright., 28 (Por- 4 “ Dense villosis.” 
lieria).—H, BN., in Adansonia, x. 315 (Por- 5 Spec. 1. P. tetracantha Gixx., loc. cit,— 
lieria) —Waxr., Rep., v. 386 (Larrea); Ann,  Watr., Rep. i. 498. 
