164 $2. ÜLMACEAE — 53. MORACEAK 



Fruit a more or less globular drupe. Embryo curved ; cotyledons folded 

 or rolled inwards. Flower-clusters or solitary flowers usually in the 

 axils of the leaves. [Subfamily CELTID0IDEAE.1 .... 3 



3. Stipules united. Leaves entire, pcnninerved. Spiny shrubs. P^lowers 



unisexual. Perianth-segments of the male flowers valvate in the bud. 

 Embryo with narrow cotyledons. — Species 4. Tropical and South 



Africa. Chaetacme Planch. & Harv. 



Stipules free. Leaves usually 3-nerved. Sjjir.ek-ss shrubs or trees. 

 Flowers usually polygamous. Perianth-segments imbricate in bud, 

 at least at the apex 4 



4. Embryo with narrow cot3'lcdons. Perianth-segments imbricate at the 



apex only. Flowers almost sessile. — Species 10. Tropical and South 

 Africa. Some species yield timber, fibre, tanning and dyeing materials, 

 and medicaments. {Sponia Commers.) (Plate 30.) Trema Lour. 

 Embryo with broad cotyledons. Perianth-segments imbricate. Stigmas 

 feathery. L'ppcr flowers upon long stalks. — Species 20. Some of them 

 j-ield timber, bast, tanning and dyeing materials, oil, medicaments, and 

 edible fruits. '• Nettle-tree.'^ Celtis L. 



FAMILY 53. MORACEAE 



Juice usually milky. Leaves stipulate. Flowers unisexual. Peiianth 

 simple or wanting. Stamens as many as and opposite the perianth-segments 

 or fewer, i — 6. Anthers opening by longitudinal shts. Ovary i-celled. Ovule 

 I, pendulous, inverted or curved, rarely erect and straight. Styles i — 2. — 

 Genera 26, species 260. (Under URTICACEAE or ULMACEAE.) (Plate 31.) 



1. Stamens of the male flowers bent inwards in the bud, subsequently bent 



backwards. Ovule pendulous. Leaves folded in bud. Stipules not 



leaving a st-m-clasping scar. [Subfamily MOROIDEAE.] . . 2 



Stamens of the male flowers straight from the beginning 14 



2. Flowers in lax cymes consisting of one female flower and several male 



ones. Perianth with a distinct tube. Stamens 4. Stj-le 2-cleft. Trees. 

 Leaves undivided. — Species i. Madagascai. (Tribe FATOUEAE.] 



Bleekrodia ßlume 



Flowers arranged in spike- raceme- or head-like inflorescences or collected 



upon flattened receptacles 3 



3. Flowers on flattened and more or less expanded receptacles, rarely in 



spike-like inflorescences ; in the latter case, as usually, male and female 

 flowers in the same inflorescence. Stamens i — 4, usually 2. [Tribe 



DORSTENIEAE.] 4 



Flowers in spike- raceme- or head-like, unisexual inflorescences (containing 

 only male or only female flowers), rarely female flowers solitary. Sta- 

 mens 4. Trees or shrubs 7 



4. Flowers in false spikes containing male and female flowers or male ones 



only. Perianth 4-partite. Stamens 4. Trees. Leaves undivided. — 



Species i. East Africa Sloetiopsis Engl. 



Flowers on flattened receptacles 5 



