354 ORDER 152. XYRID.YCE/E. 



2 T. pilosa T,ehm. Umbels sessile, terminal and axillary; leaves lanceolate, hairy 



both sides ; flowers small, bluish purple. Banks, 111. to O., and S. 2f. 



3 T. rose A MX. Umbels terminal, ped *rwlate, with subulate bracts ; leaves linear ; 



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



4 T. CRA8SIFOLIA. From Mexico, a trailing leaf-plant, in vases and baskets, with thick 



ovate leaves, variegated with purple, green, and white. Flowers roseate. 



3. MAYACA, Aubl. Stamens 3, opposite the sepals. Caps. 1-celled. 

 Seeds several, attached to the middle of the valves, zz Moss-like, creep- 

 ing, branching, beset with narrow, linear leaves. Peduncles solitary, axil- 

 Ituy, 1-flowered. Resembles a Sphagnum. 



HI. ITIicliauxli Schott. & Endl. Fed. longer than the Ivs. (which are 2 3"), refloxcd 

 iu fruit; pod 9-12-seeded ; petals white. Shallow waters, Va. to Fla. July. 



ORDER CLII. XYRIDACE^E. XYRIDS. 



Herbs sedge-like, with equitant leaves and a scape bearing a head ol 

 regular triandrous flowers. Perianth of 3 glumaceous sepals and 3 colored 

 petals. Fertile stamens on the claws of the petals. Style 3-cleft. Capsule 

 3-valved, co-seeded. 



XYRIS, L. YELLOW-EYED GRASS. Head of flowers ovoid-cylindrical, 

 invested with an armor of cartilaginous scales. One sepal membranous, 

 involving the yellow corolla in bud, the 2 lateral strongly keeled, persistent 

 Pet. crenulate, on claws, caducous. 3 sterile sta. alternately with the 3 fer- 

 tile, y Lvs. radical, linear, sheathing the base of the slender scape. Jn.-Aug. 



* Scape 2-edged above (except No. 6). Lrs. long, linear, flat, often twisted. . .(a;) 



* Scape terelish, its Ivs. shorter than its sheath (No. 9) or longer, and filiform.. .No. 8 



x Sepals exceeding the bract, and fringed on the winged keel Nos. 6, 7 



x Sepals (the 2 lateral) included, y winged and ciliate on the keel NOB. 3 5 



y wingless or very nearly so Nos. 1, 2 



1 X. flexuosa Muhl. Common X. Scape 6 18', often bulbous at base ; Ivs. narrowly 



linear, 39', often twisted ; head ronnd-ovoid, 3 4" ; sepals minutely bearded at the 

 tip, lance-oblong, quite wingless on the keel. N. Eng. to 111. and Ga. 



2 X. anibigua Beyr. Scape 2 3f; Ivs. broad-linear, rough-edged, 6 12'; hd. lance- 



oblong, 915" ; sepals lanceolate, slightly winged ; petals large (*"). Barrens, S. 



3 X. < 'sn-olliiia.ua Walt. Scape 1 2$f, the broad-linear Ivs. more than half as long ; 



hd. yellowish-brown, 6 9" ; sep. obscurely fringed ; pet. 4 5". Swamps, Mass, to Fla. 



4 X. Elliottll Chapm. Scape 2-edged throughout, 11 Jf; Ivs. narrow-lin., J as long; 



hd. obovoid, 4 5" ; sep. cut-fringed on the wing ; pet. 3". Wet barrens, S. Car. to Fla. 



5 X. plat^Iepls Chapm. Scape 2 3f, twisted, as well as the broad-linear Ivs. : hd. 9 



1 S". pale ; sepals fringed at the apex, wing narrow ; petals 23". Sands, S. Car. to Fla. 



G X. torta Sin. Bulbous ; te r ete scape and rigid Ivs. twisted ; hd. oval to oblong, 5 9"; 



sepal fringe exserted ; petals large, roundish, 8". Sand, N. J. to Fla. (X. bulbosa K.) 



7 X. fimbrlala Ell. Scape rough, 2 3f, the broad-linear Ivs. nearly as long ; hd. largo, 



ovoid. 9 12'' ; sepals much fringed and exserted ; petals small (3 4"). N. J. to Flc. 



8 X. IfiiUUviiilaiia li. &S. Scape 6 18', twice longer than the filiform bristle-point- 



ed leaves ; head oval, 2 4"; sep. falcate, keel winged, ciliolate. Fla. (X. fllifoliaCh.) 



9 X. brevlfolla MX. Scape 4 12' ; Ivs. linear to subulate, i 2', spreading two wnyo ; 



head oval. 3 3''; fep. wingless ; pet. 2". Wet places, S. (X. flabellifomiis Chapm.) 



