494 FLORA OF TEXAS. 



forming in fruit a membranaceous cone; calyx enliiTged in 

 fruit ; embryo spirally coiled. — A rough perennial twining 

 herb, with cordate 3-5-lobed leaves, and greenish-yellow 

 flowers. 



IL LUPULUS, L. Low grounds along the mountains. 

 June and July. Stem 6°-10° high ; leaves petioled, ser- 

 rate; achenium covered with resinous yellowish odorous 

 grains. 



116. MULBERRY FAMILY. Order, MoRACEiE. 



Trees or shrubs, with milky juice, alternate leaves, with 

 large deciduous sti2nilcs, and monoecious or dioecious /oz6'- 

 ers, crowded in spikes or heads, or inclosed in the fleshy 

 receptacle; calyx of the sterile flowTrs 3-4-lobed; stamens 

 3-4, inserted on the base of the calyx ; filaments inflexed 

 in the bud, elastic ; calyx of the fertile flowers 3-5-sepalous ; 

 ov«?'?/ 1-2-celled, 1-2-oTuled ; styles 2-, ache?iium 1-seeded; 

 embryo curved, in fleshy albumen. 



MORUS, Tourn. Mulberry. 



Flowers monoecious, spiked, the sterile and fertile flowers 

 in separate spikes; calyx 4-parted; stamens 4; ovary 

 2-celled; styles filiform; achenium ovate, compressed, 

 covered by the succulent berry-like calyx. — Trees, with 

 rounded leaves, and axillary spikes. 



M. RUBRA, L. Leaves cordate-ovate, acuminate, seiTate, 

 petioled, rough above, white-tomentose beneath, on young 

 shoots 3-5-lobed; stipules linear; sterile spikes slender, 

 drooping; i\\Q fertile ones ovoid or oblong, resembling a 

 blackberry in fruit. Rich woods. March. — A small tree. 



M. ALBA, L. Leaves cordate-ovate, acute, serrate, oblique 

 at the base, smooth and shining, sometimes lobed ; fruit 

 whitish. Introduced. — A small tree. 



M. MICROPHYLLA, Buckley. Leaves cordate-ovate or 

 3 -lobed, serrate, teeth mucronate, smooth, veins and mar- 



1 



1 



