196 OXALTDE^. (WOOD-SORREL FAMILY.) 



P. Endliclieriasium, Fenzl. 2C Sa'udihan TcMcheha .3 to .5, 

 velvety-pubescent ; stems thick, erect, simple or sparingly branched. 

 Root leaves round-heart-shaped or reniform, crenate, the upper stem 

 leaves 3-5-parted into incised lobes, the middle one rhomboid, trifid. 

 Peduncles long, the terminal one o-15-flowered. Calyx lobes linear-lanceo- 

 late, acute; the upper pair of petals purple, .03 long, thrice as long as 

 calyx, the lower three rudimentary, one-third to one-half as long as 

 calyx, pale, entire or bifid — Summer — Rocky places ; Amanus and 

 northward. 



Order XXVI. OXAL-II>EiE. (Wood-Sorrel Family). 



Hey'hs with sour juice, trefoil leaves, and regular, 

 syimnetriGal, hi/pogyrioios^ ^-merous, someiohat Tnonadel- 

 phous l()-lo-a)i(lrous flowers, iinhricated calyx, convolute 

 petals, 5 distinGt styles, and a ^-celled, several-seeded cap- 

 sule — Anthers with 2 slits. Placenta central. 



OXAL<I§, L. Wood Sorrel. Hlmmmadh. 



Sepals persistent. Stamens 10, the outer shorter than the inner. 

 Capsule loculicidal. Seeds with fleshy aril, separating elastically from 

 tip ; shell crustaceous ; albumen fleshy ; embryo straight — Stipuled 

 herbs. 



O. corniculata, L. 1([ .2 to .4 ; root not stoloniferous ; stems 

 diffused, rooting at base. Stipules oblong, adnate to petiole ; leaflets 

 obcordate. Peduncles with 2-3, yellow, .01 broad flowers ; pods .015 

 long, .003 broad — Spring and summer — Moist places ; common. 



Order XXVII. RUTACE JE. (Rue Family). 

 Plants, icsually with gland alar-dotted leaves, a heavy 

 odor due to an acrid, aromatic, volatile oil, hermaphrodite 

 S-6-7ne'rous, hypogynous flower's, stamens as many or twice 

 as many as sepal s^ (rarely more) ovary luith as many 

 carpels as calyx-lohes, raised on a prclongation of the , dish 

 — Leaves stipuled or exstipulate. (Jaljx imbricated or open 

 in the bud. Cells 2 4-co -ovuled, ovules anatropous, ascending, 

 inserted on a central placenta. Style 1, arising between 

 the carpels; stigma simple. Cells of capsule splitting down 

 their inner side, sometimes free. Albumen fleshy, embryo 

 curved in axis of albumen, or nearly straight, radicle superior. 



* Flowers irregular. Endocarp separating elastically Jrom sarcocarp, 



1. DICTAMNUS Petals 5. Stamens 10. Flowers panicled, purple, showy, 



* * Flowers regular. Endocarp separable from sarcocarp. 

 j Leaves exstipulate, glandular dotted, strong-scented. 



2. RUTA. Petals 4- Stamens 8. Flowers corymbed, yellow. 



3. HAPLOPHYLLUM. Petals 5. Stamens 10. Flowers corymbed, yellow. 



t t Leaves stipuled, not glandular dotted, nor strong-scented. 



4. TETRADICLIS. Petals and stamens 4. Dwarf herbs with minute, spiked flowers. 



5. PEGANUM, Petals 5. Stamens 12-15. Flowers .03 broad, white, terminal. 



