28 DATISCE^. 



ORDER IX. D A T I S C E XE . 



"With us represented by a species of 



DATISCA, Linn. Stout glabrous dioecious perennials. Leaves lacin- 

 iate-pinnatifid; the segments coarsely toothed. Flowers axillary, sub- 

 sessile, fascicled. Calyx of sterile fl. very short, with 4 9 unequal lobes. 

 Stamens 10 25; filaments short. Calyx of pistillate fl. with ovoid tube 

 somewhat 3-angled, 3-toothed, the stamens when present 3, alternate 

 with the teeth. Styles 3, bifid, opposite the teeth, the linear lobes stig- 

 matic on the inner side. Capsule oblong, coriaceous, 1-celled, opening 

 at apex between the styles. Seeds oo, small, in several rows on the 3 

 parietal placentae; embryo cylindrical, in the axis of small albumen. 



D. glomerata (Presl.), Brew. & Wats. Erect, 36 ft. high, simple or 

 sparingly branching: leaves of ovate or lanceolate outline, acuminate, 6 

 in. long; the floral shorter: fl. 4 7 in each axil of the long leafy raceme, 

 the fertile mostly perfect: anthers subsessile, 2 lines long, yellow: styles 

 exceeding the ovary : capsule oblong-ovate, 3 4 lines long, slightly nar- 

 rowed toward the truncate triangular 3-toothed summit. Along moun- 

 tain streams. 



ORDER X. CISTOIDE/E. 

 In Asia an extensive family, of which we have one species. 



HELIANTHEMUM, Valerius Cordus. Low, branching, suffrutescent. 

 Leaves alternate, simple, entire. Flowers perfect, regular. Sepals 

 mostly 5, unequal, persistent. Petals 5, yellow, fugacious. Stamens oo , 

 hypogynous; filaments filiform; anthers short. Style 1, short, decid- 

 uous. Capsule ovoid, 1-celled, few- or many-seeded; the seeds borne on 

 the middle of the valve. 



H. scoparinm, Nutt. Plant a bushy tuft 1 ft. high, glabrate, or 

 stellate-pubescent: leaves narrowly linear, % 1 in. long: fl. on slender 

 pedicels, solitary or cymose at the ends of the branches: sepals 3 lines 

 long, acuminate, the 2 outer linear and much shorter: petals 4 lines: 

 stamens about 20: 'capsule equalling the calyx. Common on dry hills. 



ORDER XI. V I L A R I E /E . 



Eepreseuted by a fair number of species of the principal genus of the 

 order. 



VIOLA, Pliny (VIOLET). Low perennial herbs, with alternate leaves 

 of involute vernation, foliaceous persistent stipules, and 1-flowered 

 axillary peduncles. Flowers 5-merous. Sepals unequal, more or less 

 auricled at base, persistent. Petals unequal, the lower one often spurred 



