ALTHJU. XXX VII. MALVACEAE. 207 



plant, especially the root, abounds in -mucilage. Jn. Oct. $ f 

 3. M. HOUGHTONII. Torr. & Gray. Hmightori's Malva. 

 St. erect, hirsute; Ivs. strigose, ovate, truncate at the base, lower ones 

 cordate, all undivided, coarsely crenate ; panicle terminal, diffuse, many-flow- 

 ered ; pet. purple ; carpels 10 15. Prairies and bottoms, 111. Mead ! &c. A 

 handsome but rather rough species, 2 3f high. Root fusiform. Leaves 2 3' 

 by 1 2', on long, hairy petioles, thick. Flowers nearly as large (!' diam.) 

 as those of M. sylvestris. Jl. Aug. 



4. M. MAURITIANA. fry-leaved Mallow. St. erect ; Ivs. 5-lobed, obtuse ; peti- 

 oles and pedicels smoothish, or downy on the upper side. (J) From S. Europe. 

 A tall species, 4 6f high. Stem smooth. Flowers purple, with deeper colored 

 veins, f 



5. M. MOSCHATA. Musk Mallow. St. erect; radical Ivs. reniform, incised, 

 cauline ones many-parted, the segments linear; ped. and cal. hairy. Native oi 

 Britain. Stems 2f high, branched. Flowers large and handsome, rose-colored. 

 The whole herb gives out a musk-like odor in favorable weather. Jl. 



6. M. CRISPA. Curled or Crisped-leaved Mallow. St. erect ; Ivs. angular-lobed, 

 dentate, crisped, smooth; fls, axillary, sessile. (I) A tall, straight, simple, erect 

 plant from Syria. Gardens, almost naturalized. Stem 5 6f high. Leaves 

 large, roundish, margins abundantly crisped and curled. Flowers white, not 

 conspicuous. Jn. Aug. f 



2. GOSSYPIUM. 



A word said to be from the Arabic, goz, a silky substance. 



Calyx obtusely 5-toothed, surrounded by an involucel of 3 cordate 

 leaves, deeply and incisely toothed : capsule 3 5-celled ; seeds in- 

 volved in cotton. Fls. yellow. 



1. G. IIERBACEUM. Common Cotton Plant. Lvs. 5-lobed, with a single gland 

 below, lobes mucronate; cotton white. This is the species commonly culti- 

 vated in the Southern States. It is an herbaceous plant, about 5f high. The 

 flowers like those of all the other species are yellow. Leaves cut half way 

 down into 3 large and 2 small, lateral, rounded, pointed lobes. Gland on the 

 mid vein at its back, half an inch from the base. Jl. j- 



2. G. BARBADENSE. Sea Island Cotton Plant. Lvs. 5-lobed with 3 glands 

 icneath, upper ones 3-lobed; seeds black; cotton white. (g) Native and cuhi- 

 'ated in the W. Indies. A larger plant than the foregoing. Sown in Sept. 

 ind Oct. An acre yields an average product of 270 pounds of this cotton. 

 These plants are ornamental in cultivation, f 



3. LAVATERA. 



Named in honor of the two Lavaters, physicians of Zurich. 



Calyx surrounded at base with a 3-cleft involucel ; carpels 00, 1 

 celled, 1 -seeded, indehiscent, arranged circularly.. 



1. L. ARBOREA. Tree Mallow. L/vs. 7-angled, downy, plicate; pedicels axii 

 lary, l-flowered, clustered, much shorter than the petiole. @ A splendid plant 

 for borders or shrubberies, trom Europe. Height about 6f. Flowers purple. 

 Sept. Oct. f 



2. .L. THURINGIACA. Gay MaUmv. Lvs. somewhat downy ; lower ones angu- 

 lar, upper ones 3-lobed, the middle lobe largest. 7J. From Germany. Height 

 4f. Flowers light blue. Sept. 



4. ALTHAEA. 



Gr. aA^o), to cure ; the mucilaginous root is highly esteemed in medicine. 



Calyx surrounded at base by a 6 9-cleft involucel ; carpels 00, 1- 

 soeded, indehiscent. arranged circularly around the axis. 

 IS* 



