366 ULMACEAE 



4. MOMISIA F. G. Dietr. 



Spine-armed shrubs or small trees, with usually pubescent or scabrous foliage. Leaf- 

 blades often leathery, variously toothed, nearly equilateral : stipules in the form of spines. 

 Flowers polygamo-monoecious, at least the staminate in elongated axillary cymes. Calyx 

 with 4-5 lobes, deciduous. Stamens 4-5, exserted : filaments longer than the extrorse 

 anthers. Ovary sessile, 1-celled. Stigmas 2-cleft. Drupe oblong, ovoid or globose, some- 

 times slightly angled, with a more or less flattened, tuberculate or reticulated stone. 



Leaf-blades nearly smooth ; drupe 8-12 mm. in diameter : stone with warty faces. 1. M. actdeata. 



Leaf-blades very scabrous : dupes 5-8 mm. iu diameter : stone with reticulated faces. 2. M. pallida. 



1. Momisia acule^ta (Sw. ) Kl. A spreading or often climbing shrub, 1-3 m. tall, 

 with little or no pubescence, its branches and twigs with more or less recurved stipular 

 spines. Leaf-blades ovate, oval or oblong-ovate, obtuse or acutish, nearly entire or 

 coarsely crenate-serrate above the middle, rounded or cordate at the base, slightly inequi- 

 lateral and sometimes oblique at the base, nearly smooth on both sides, short-petioled : 

 flowers in cymes : pedicels 2-5 mm. long : drupes globose-ovoid, 8-12 mm. long, obscurely 

 4-angled : seeds obliquely oval, slightly flattened, warty. [Celtis aculeata Sw.] 



In sandy soil, Florida Keys and the valley of the Rio Grande. Also in tropical America and the 

 West Indies. Spring. 



2. Momisia pallida (Torr. ) Planch. A spreading shrub 2-4 m. tall, with puber- 

 ulent twigs and inflorescence, its branches armed with straight stipular spines. Leaf-blades 

 ovate to oblong, 2-3.5 cm. long, acute or apiculate, 3-nerved, nearly entire or coarsely 

 toothed, slightly inequilateral, often oblique at the rounded or subcordate base, very 

 scabrous on both sides, short-petioled : cymes 3-5-flowered : pedicels 1-2 mm. long, shorter 

 than the petioles : drupes subglobose, 5-8 mm. in diameter, yellow, orange or red, with 

 an acid pulp : seeds oval or obovoid, 4-ribbed, reticulated. l_Celtis pallida Torr.] 



In sandy soil, Florida and Texas to northern Mexico. Spring. 



5. TREMA Lour. 



Tall shrubs or trees, unarmed, usually pubescent. Leaves alternate, often 2-ranked : 

 blades toothed, 3-nerved at the base, equilateral or only slightly inequilateral, short-peti- 

 oled : stipules lateral. Flowers mostly monoecious or polygamous, the perfect mostly fer- 

 tile, in axillary cymes. Sepals of pistillate flowers indaplicate-valvate, those of the perfect 

 flowers slightly imbricated. Stamens 4-5. Ovary sessile. Stigmas 2, entire. Ovule 

 pendulous. Drupe ovoid to globose. 



1. Trema Florid^na Britton. A shrub or tree 6 m. tall, with copiously pubescent 

 foliage. Leaf-blades ovate, oblong-ovate or lanceolate, 4-10 cm. long, more or less acu- 

 minate, scabrous-pubescent above, softly pubescent beneath, finely serrate, rounded or 

 cordate at the base : flowers greenish : drupes subglobose, yellow or orange. 



In woods and hammocks, peninsular Florida and the Keys. 



Order 9. POLYGONALES. 



Herbs, shrubs, trees or vines. Leaves alternate, or sometimes opposite or 

 whorled : blades mostly entire : stipules mostly present, usually as a sheath. 

 Flowers perfect, monoecious, dioecious or polygamous, in variously disposed 

 clusters. Calyx inferior, of 2-6 more or less united sepals sometimes developing 

 keels or wings, often corolloid. Androecium of 2-9 stamens. Filaments often 

 dilated at the base. Anthers 2-celled, opening longitudinally. Gynoecium 2-3- 

 carpellary. Ovary superior, 1-celled. Styles 2 or 3, more or less united. 

 Stigmas capitate or tufted, rarely 2-cleft. Ovule solitary, orthotropous. Fruit 

 a lenticular or 3-angled achene, usually invested by the persistent calyx. Seed 

 with horny or mealy endosperm. Embryo with incumbent or accumbent coty- 

 ledons. 



