1104 OLACACEAE 



Flowers perfect or polygamous, regular, in axillary cyrues or racemes, which are 

 sometimes contracted in heads. Hypauthium present. Calyx of 4-6-sepals or 

 a mere border. Disk sometimes cup-shaped and free, or adnate to the ovary or 

 calyx, sometimes annular, scale-like, or obsolete. Corolla of 4-6 petals, distinct 

 or united into a more or less tubular corolla, inserted on the disk or receptacle, 

 the lobes valvate. Androecium of 4-12 stamens inserted with the petals or ad- 

 nate to the corolla-tube : filaments distinct or rarely united : anthers introrse. 

 Gynoecium a single compound pistil. Ovary free or immersed in the disk, or 

 partially inferior, 1-4-celled, the divisions often incomplete. Styles mostly 

 united. Stigma entire or 3-4-lobed. Ovules auatropous. Fruit a drupe, naked 

 or nearly enclosed in the accrescent disk. Seed with a membranous testa. En- 

 dosperm fleshy or rarely wanting. Embryo straight. 



Petals united to above the middle : stamens as many as the corolla-lobes and opposite them : drupe 

 nearly enclosed in the disk, 1. Schoepfia. 



Petals nearly distinct : stamens twice as many as the petals : drupe naked. 2. Ximenia. 



1. SCHoiiPFIA Schreb. 



Unarmed glabrous tropical shrubs or small trees, commonly with brittle wood. Leaves 

 alternate : blades leathery, entire, often histrous above. Flowers perfect, in solitary or 

 clustered short-peduncled axillary cymes. Hypantliium short, cup-shaped, tilled with a 

 large hypogynous disk which is adnate to the ovar^^ Petals united to above the middle? 

 varying from white to red : lobes 4-6, valvate, recurved. Stamens as many as the corolla- 

 lobes, adnate up to their bases : anthers sessile or terminating short filaments. Ovary 

 3-celled, mostly immersed in the disk : stigma 3-lobed. Ovule 1 in each cavity. Drupe 

 enclosed to near the apex in the adnate accrescent disk : stone crustaceous or parchment- 

 like. 



1. Schoepfia Schrfeberi J. F. Gmel. An unarmed glabrous shrub or tree, several 

 m. tall, witli pale brittle branches. Leaf-blades ovate or oblong-ovate, leathery, 2-6 cm. 

 long, acute or obtusish, entire, acute or abruptly constricted at the base, on sliort winged 

 petioles : peduncles usually 2-3-flowered, solitary or clustered : flowers red or reddish : 

 nypanthium cup-like, 2 mm. broad : disk iiemispheric, slightly dilated at tiie entire rim : 

 corolla leathery, tubular-campanulate, 4-ribbed, about 4 mm. long, glabrous within and 

 without, the 4 ovate lobes curled back, acute : drupe ovoid or oval-ovoid, 10-12 mm. long. 



In coral rock or sand, peninsular Florida and the Keys,. 



2. XIMENIA L, 



Tropical usually thorny shrubs or trees, with glabrous or pubescent foliage. Leave* 

 alternate, often clustered : blades entire. Flowers perfect, solitary in the axils or in 

 axillary cymes. Calyx small. Petals 4-5, valvate, white or yellow, nearly distinct, 

 leathery, pubescent within. Stamens 8-10, shorter than the petals : filament filiform, 

 erect : anthers linear, opening lengthwise. Ovary 3-4-celled : styles united : stigma capi- 

 tate. Ovules 3-4 in each cavity. Drupe pulpy, crustaceous with a woody stone. 



1. Ximenia Americana L. A glabrous thorny shrub or small tree 4-6 m. tall. 

 Leaf-blades firm, oblong or elliiitic, sometimes broadest above or below the middle, 3-7 

 cm. long, obtuse or notched at the apex, entire, acute or rounded at the base, commonly 

 clustered in 3's ; petioles 5-10 mm. long: peduncles about as long as the petioles, 2-4- 

 flowered : flowers yellowish : sepals 4, triangidar, acutish : petals 4, leathery, linear, 1 

 cm. long, densely pubescent with bristly rusty hairs within, glabrous without, the tips 

 curled back, nunutely caudate : stamens shorter than the petals : filaments filiform, shorter 

 tiian the anthers : drupe subglobose or broadly oval, 14-17 mm. in diameter, yellow : stone 

 white. 



In coral rock or sand, peninsular Florida and the Keys. Circumtropical. 



Order 10. RUBIALES. 



Herbs, shrubs or trees. Leaves opposite, sometimes whorled : blades mainly 

 entire. Flowers pei'fect, or rarely polygamous, solitary or in variously modified 

 cymes. Hypanthium well developed. Sepals 3-6 or rarely 10, sometimes very 

 small. Corolla of 3-6 or rarely 10 partially united petals. Androecium of as 



