ROSACEJE 



877 



Tribe 6. CHRYSOBALANOIDE/E. Fruit a 1-seeded drupe; ovary 1-celled; style lateral, 



ovules ascending. 

 Flowers in axillary or terminal cymose panicles; leaves simple, persistent. 



11. Chrysobalanus, 



1. VAUQUELINIA Corr. 



Trees or shrubs, with slender terete branchlets and scaly bark. Leaves alternate or 

 rarely opposite, lanceolate, serrate, long-petiolate, reticulate-veined, coriaceous, persistent; 

 stipules minute, acute, deciduous. Flowers on slender bibracteolate pedicels, in com- 

 pound terminal leafy cymose corymbs; calyx short-turbinate, coriaceous, 5-lobed, the 

 lobes ovate, obtuse or acute, erect, persistent; petals 5, orbicular or oblong, white, becom- 

 ing reflexed, persistent; stamens 15-25, inserted in 3 or 4 series, equal or semiequal, those 

 of the outer row opposite the petals; filaments subulate, exserted, persistent; anthers versa- 

 tile, extrorse; carpels 5, opposite the sepals, inserted on the thickened base of the calyx- 

 tube and united below into a 5-celled ovoid tomentose ovary crowned with 5 short spread- 

 ing styles dilated into capitate stigmas; ovules subbasilar, ascending, prolonged at the apex 

 into thin membrariaceous wings; raphe ventral; micropyle superior.. Fruit a woody ovoid 

 5-celled tomentose capsule inclosed at the base by the remnants of the flower, the mature 

 carpels adherent below and at maturity splitting down the back. Seeds 2 in each cell, as- 

 cending, compressed; testa membranaceous, expanded into a long terminal membranaceous 

 wing; embryo filling the cavity of the seed; cotyledons flat; radicle straight, erect. 



Vauquelinia is confined to the New World and is distributed from New Mexico, Arizona 

 and Lower California to southern Mexico. Three species are distinguished; of these one 

 inhabits the mountain ranges of southern Arizona and New Mexico. 



The generic name is in honor of the French chemist Louis Nicholas Vauquelin (1763- 



1. Vauquelinia calif ornica Sarg. 



Leaves narrowly lanceolate, acuminate or rarely rounded at apex, abruptly cuneate 

 or slightly rounded at base, and remotely serrate with minute glandular teeth, when they 

 unfold puberulous above and densely tomentose below, and at maturity coriaceous, bright 



Fig. 335 



yellow-green and glabrous on the upper and tomentose on the lower surface, l'-3' long, 

 i'-j' wide, with a thick conspicuous midrib grooved on the upper side, and numerous thin 

 primary veins connected by reticulate veinlets; deciduous in spring or early summer; petioles 

 thick, \'-\' in length. Flowers appearing in June, \' in diameter, in hoary-tomentose 

 panicles 2'-3' across; petals oblong; inner surface of the disk pilose. Fruit fully grown by 



