66 ORDER 29. ZYGOPHYLLACE^E. 



2. SWIETENIA MAHOGONI, L. MAHOGANY TREE. A large and 



beautiful tree growing in South Florida, Mexico, and the Isthmus. 80 lOOf. The reddish- 

 brown ornamental wood is well known. Lve. smooth, abruptly pinnate, with 610 lance- 

 ovate Lfts. Fls. small, yellowish, in panicles, 5-parted. Pod size of a goose-egg, GO-seeded. 



ORDER XXVIII. LINAGES. FLAXWORTS. 



Herbs with entire, simple leaves, and no stipules; with flowers regular, 

 symmetrical, and perfect, 5-(rarely 3 or 4)-parted. Calyx strongly imbri- 

 cated in the bud, corolla contorted. Stamens definite, hypogynous, alter- 

 nate with the petals. Styles distinct, with capitate stigmas, and each ceil 

 of the capsule more or less divided by a false dissepiment into two 1-seeded 

 compartments. Seeds with little or no albumen, attached to axile pla- 

 centae. - Figs. 10, 11, 130, 136, 469. 



LINUM, L. FLAX. Sepals, petals, stamens, and styles 5, the latter 

 rarely 3. Caps. 6-10-celled. Seeds 10, suspended, mucilaginous. Herbs 

 with a bark of strong fibres, and simple, sessile leaves. 



Flowers yellow, small (2 1" broad). Species (T), native. Jane August. . .(a) 

 a Sepals entire, 1-veined, as long as the depressed or globous capsule. . .Nos. 1 4 

 a Sepals glandular-fringed, longer than the globular-ovoid capsule Nos. 5, 6 



* Flowers blue, large (!' broad). In fields and gardens Nos. 7, 8 



* Flowers large, showy, red or yellow. Garden exotics Nos. 9, 10 



1 L. Virginian um L. Sts. teretish, erect, corymbous above, branches short, spread- 



ing, terete ; Ivs. oblong to lanceolate, mostly scattered ; fls. 4-5' broad ; caps, depressed, 

 styles distinct. Woods and hills. 2f. Prof. Porter distinguishes No. 2 from this. 



2 Li. NtriAt um Walt. St. striate, often clustered ; branches short, ascending, sharply 



about 4-angled ; Ivs. lance-oblong, the lower mostly opp. Fls. and fr. as in No. 1. Com. 



3 L. simplex Wood. Stem single, terete, corymbed at top, branches subterete ; leaves 



linear-subulate, erect, scattered ; caps, globular ; sty. distinct ; fls. 3", few. S-W. 18'. 



4 L. difiTtisum Wood. Stems very slender, ascending, with long, filiform, diffuse, an- 



gular branches ; Ivs. veiny, lance., spreading, 9-12" ; fls. 2" broad; pod depressed. W. 



5 1^. suit-tit um Kiddell. St. and branches sulcate, strict, erect ; Ivs. lin., erect ; sep. 3- 



veined, acuminate ; sty. united below. Conn, to 111., and S. 1 IJf. (L. rigidum C-B.) 



6 L.. rigidum Ph. Stems low and branches rigidly erect, angular-sulcate ; Ivs. linear- 



pubulate, erect ; sepals lance-linear, twice longer than the pod. Iowa, Min., and W. 



7 1^. USITATISSIMUM L. Common Flax. Leaves lance-linear; panicle corymbous; 



flowers axillary ; petals crenate. 2f. The strong bark yields linen. Europe. 



8 I*. PERENNE L. if Leaves linear ; flowers supra-axillary and terminal ; petals retuse, 



light blue. California 1 and Europe. Flowers numerous and showy. 



9 I*. GRANDIFLORUM. Leaves lance-elliptical ; flowers red ; styles 5. N.Africa. 10'. 



1 JL. TKIGYNUM. Leaves elliptical ; flowers yellow ; styles 3. E. India. If. 



ORDER XXIX. ZYGOPHYLLACE^E. BEAN CAPERS. 



Herbs, shrubs, or trees, with leaves opposite, mostly pinnate (not dotted) 

 and stipulate. Flowers 4- or 5-merous, corolla imbricate or convolute in 

 bud. Stamens twice as many as the petals, hypogynous, distinct, each often 

 with a scale. Ovary compound ; style and stigma 1 fruit and seeds aa iu 

 Linacese. 



