l56 riG-MARIGOLD FAMILY. 



C miUtiplex. Stem green, with about 13 acute ridges and 10-12 rather 

 long unequal spines. 



5. ECHINOC ACTUS. (Name means Sping or Hedgehog Cactus.) There 

 are many wild species far S. W., but few common in cultivation. Flowers 

 mostly small, opening for 2 or 3 days, closing at night. 



- E. Texensis, of S. Texas and Arizona, has stem much broader than high, 

 or globular when young, becoming 1° broad, with 12-27 acute wavy ridges, 

 6 or 7 very stout and horn-like reddish recurved spines ; the central one larger 

 and turned down, sometimes 2' long ; flower rose-colored, very woolly, 2' long. 

 E. Ott6llis, from Brazil, is pear-shaped, becoming club-shaped, 2' ^ 3' 

 thick, witli 12 - 14 nan-ow ridges, clusters of 10 - 14 short sisnder prickles, and 

 yellow flowers with red stigmas. 



6. MELOCACTUS, i. e. MELON-CACTUS. One species is often brought 

 from the West Indies, but dijes not long survive, viz, 



M. comm'tinis, called Turk's-Cap. Globular or ovate, dark gi-een, often 

 1° high, with 12-20 ridges, beset with clusters of short brownish spines ; the 

 cylindrical muff-like crown of bristles and cottony wool, 2' -5' high. In which 

 the very small pink flowers are half-imbedded ; berries small, red. 



7. MAMIXiIiAHIA. (Name from the nipple-shaped tubercles which cover 

 the stem.) Many wild species far W. and S. W. on the plains : few common 

 in cultivation. 



M. longimd/TUina, from Mexico, has the tubercles rising from a depressed 

 body, or apparently almost from the root, 1' or more long, loosely spreading, 

 much longer th.in the 8-11 prickles at their apex ; flowers large for the genus, 

 1^' lonj;-, yellow. 



M. pusilla, wild in Texas and S., with clustei-ed ovate or plobniar stems 

 l'-2' long, oblong or ovate tubercles bearing wool in their axils, and tipped 

 with very many capillary crisped bristles and several slender prickles j flowers 

 pink, i' long. _ 



M. gracilis, with globular and at length short-cylindrical stems 1 ' - 2' 

 long, excessively proliferous, the oblong tubercles bearing about 16 recurving 

 white prickles, and on older plants 1 or 2 stouter and longer straight ones of a 

 brown hue ; flowers small, white. 



M. elongS/ta, with cylindrical clustered stems, covered with short conical 

 tubercles, which bear 16-30 unitbrm radiating and recurving slender prickles 

 in a starry tuft, and very rarely a central one ; flowers small, white. 



M. vivipara, wild from Nebraska S., l'-5' high, simple, or proliferous 

 in tufts, globular, with the terete tubercles slightly grooved down the 

 upper side, bearing 12-30 rigid widely radiating whitish prickles, and 3-12 

 stouter and darker ones ; flower pink-purple, large for the plant, about 2' in 

 diameter. 



50. MESEMBRYANTHEME.2E, FIG-MARIGOLD 

 FAMILY. 



Fleshy plants, of aspect between the Cactus, Purslane, and Orpine 

 Families, with simple entire leaves, and calyx-tube coherent with 

 the compound ovary, which has 4-20 styles and as many cells : 

 represented in cultivation by the following. 



1. MESEMBRYANTHKMUM. Herbaceous or flesliv-shrnbbv and prostrate or low 



branching plants, with very succulent leaves ami mostiv handsome flowers, 

 opennig only in bright light, commonly at noon. Lobes oi' the calyx mostiv 5. 

 Petals (linear) and stamens very numerous, on the cnlvx. Styles, cells of'the 

 ovary, and radiating horns or lobes of the manv-seeded pod 4-20. 



2. TKTRAfiO.MI A. Low spreading herbs, with broad and flat tliickish leaves, and 



small flowers in their axils. Calyx usually 4-lobed. Petals none. Stamens 

 few or many. Styles and l-ovnied cells of the ovary few. Fruit hard and 

 nut-like, 3 - 8-horned, 3 - 8-seeded. 



