ROSACE^E 



349 



Tribe 5. CHRYSOBALANOIDE.E. Fruit a 1-seeded drupe ; ovary 1-celled ; style lateral, 

 ovules ascending 1 . 



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



10. 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 pedi- 

 cels, in compound terminal leafy cymose corymbs; calyx short-turbinate, coriaceous, 

 5-lobed, the lobes ovate, obtuse or acute, erect, persistent; petals 5, orbicular or 

 oblong, white, becoming 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 versatile, 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 spreading styles dilated into capitate 

 stigmas; ovules subbasilar, ascending, prolonged at the apex into thin membra- 

 naceous 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, ascending, 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 Arizona and 

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

 inhabits the mountain ranges of southern Arizona. 



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

 (1763-1829). 



1. Vauquelinia Californica, Sarg. 



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

 wedge-shaped or slightly rounded at the base, and remotely serrate, with minute 



glandular teeth, when they unfold puberulous above and densely tomentose below, at 

 maturity coriaceous, bright yellow-green and glabrous on the upper and tomentose 



