XYRIS. CLVIII. XYRIDACE^E. 563 



1. C. ANGUSTIFOLIA. Michx/i (C. erecta. Willd.) Day Flower. 



St. assurgent, branching, subgeniculate ; Ivs. lanceolate, subpetiolate, 

 sheaths split to the base ; spathe broad-cordate, distinct and open at base, en- 

 folding 2 peduncles and several flowers ; pedicels contorted ; pet. unequal, the 

 lower one much smaller, unguiculate ; sta. 2, perfect. Dry soils, Middle ! 

 Southern and Western States ! Plant nearly smooth, 12 18' high, glabrous. 

 Leaves 3 5' by 8 14", varying from lance-linear to lance-ovate. Spathe 

 veiny, 3 5-flowered. Petals deep blue. July, Aug. 



2. C. VIRGINICA. Linn. 1 (C. longifolia. Michx.} 



St. erect, branched at base, ciliate-pubescent; Ivs. lanceolate, subpetiolate, 

 sheaths entire, elongated, ciliate-pilose ; bracts deltoid-falcate, united and entire 

 at base as if peltate, about 2-flowered ; pet. nearly equal ; sta. 3, perfect. Rocky 

 woods, thickets, Penn. (MuM.) Harper's Ferry ! to Ga. A more slender, but 

 erect species, 1 2f high. Leaves 3 5' by 6 12", usually narrow-lanceolate, 

 pilose-scabrous, the sheaths near 1' long. Spathe broadly funnel-shaped. Pe- 

 tals blue. July, Aug. Neither of these plants agrees with the descriptions in 

 the books. 



2. TRADESCANTIA. 



Named in honor of John Tradescant, gardener to Charles I. 



Sepals persistent ; petals large, suborbicular, spreading ; filaments 

 clothed with jointed hairs ; anthers reniform. ^ Fls. in terminal, 

 close umbels, subtended by 2 or 3 long, leafy bracts. 



1. T. VIRGINICA. Spider-wort. 



St. erect, simple or branched ; Ivs. lance-linear, channeled above, sessile, 

 glabrous ; fls. in a terminal, subumbellate cluster, pedicels finally elongated and 

 reflexed; cal. pubescent. Moist meadows, prairies, &c., Middle! and Western 

 States ! common. Stem thick, round, jointed, 2 3f high. Leaves numerous, 

 subpilose, 12 18' by 6 12", the bracts similar. Petals large, suborbicular, 

 of a deep, rich blue, soon fading. May Aug. The juice of the plant is viscid 

 and spins into thread ; hence the common name. 



13. 1 (T. subaspera. Sims. ?) bus. lanceolate, narrowed to the base, pilose 

 both sides, sheaths entire, ciliate with long, white hairs ; umbels both axillary 

 and terminal ; fls. small, rose-colored. Shady river banks, la. ! 



2. T. ROSEA. Michx. 



St. erect, simple; Ivs. linear, glabrous, channeled, amplexicaul; ped. 

 elongated ; cal. glabrous. Penn. to Ga., in moist woods. Stem 8 12' high. 

 Leaves 6 8' by 2 3'. Umbel terminal, subtended by 2 or 3 subulate bracts. 

 Pedicels nearly 1' long. Flowers much smaller than in the preceding species. 

 Petals rose-colored, twice longer than the smooth calyx. May. 



ORDER CLVIII. XYRIDACE^l. XYRIDS. 



Herbs, sedge-like, with linear or ensiform leaves. Fls. capitate at the top of a simple scape. 



Perianth 6-parted, in 2 series, sepals 3, glumaceous, petals 3, uneuiculate. [ments. 



Sta. 6, 3 of them with extrorse anthers and inserted on the claw of the petab, the other 3 abortive fila- 



Ova. single. Style trifid. Stigmas obtuse, lobed. 



Fr Capsule 3-valved, 1 celled, with parietal placentae, or 3-celled. 



Seeds numerous, albuminous. 



Genera 5, species 70, natives of tropical Asia, Africa and America, a few species of Xyru extending 

 into the United States. Of no important use. 



XYRIS. 



Gr. vpos , acute-pointed ; in allusion to the form of the leaves. 



Heads of flowers ovoid-cylindric ; sepals cartilaginous ; petals 

 equal, ovate, crenate, with narrow claws as long as the sepals ; cap- 

 sule 1 -celled, with parietal placentae. Lvs. narrowly linear, rigid, 

 radical, sheathing the base of the scape. Fls. in a terminal, dense head, 

 Is yellow. 



1. X. CAROLINIANA. Lam. (X. Jupacai. MX. X. flexuosa. Ell.} Yei- 

 Imo-eyed Grass. Scape slender, compressed and ancipitous above; Ivs, 



