5. Lomatogonium A. Br. Marsh Felwort 

 One species in North America; about 15 species in temperate Eurasia. 

 1. Lomatogonium rotatum (L.) Fries ex Nyman. Fig. 629. 



Slender annual glabrous plant with mostly simple stem to about 3 dm. tall; 

 leaves opposite, the basal ones oblong-oblanceolate to linear above. 2-3 cm. long; 

 flowers whitish or bluish-tinged, mostly axillary on long slender pedicels; calyx 

 7-12 mm. long, deeply parted to near base with usually 4 or 5 linear lobes; 

 corolla rotate, deeply parted, the acute lobes elliptic-oblong to ovate-lanceolate 

 and 7-12 mm. long, with a pair of scalelike appendages at the base; stamens on 

 short corolla tube; anthers versatile but sagittate at one end; style none; stigmas 

 consisting of decurrent lines on the sutures of the ovary; capsules narrowly ellip- 

 soid to ovoid-oblong, not stipitate; seeds numerous. Pleuroi^yna rotata (L.) Griseb. 



In mt. bogs and wet meadows, sometimes saline, in N. M. (Taos Co., fide 

 Wooton), summer-fall; Greenl. to Alas., s. to Colo, and (?) N. M. 



6. Halenia Borckh. Spurred Gentian 

 About 100 species mostly in America with several in Asia. 



1. Halenia recurva (Sm.) Allen. Fig. 628. 



Annual 2.5-5 dm. tall; stem simple, often branched above; basal leaves 

 elliptic-lanceolate to spatulate, less than 3.5 cm. long, about 6 mm. v/ide; 

 cauline leaves remote, lance-linear, 1.5-4 cm. long, about 3.5 mm. wide, obscurely 

 3-nerved, the midrib prominent below; inflorescence a loosely flowered subumbel- 

 late cyme; flowers on slender pedicels, 5-30 mm. long, often in sevens; calyx lobes 

 lanceolate, acute-attenuate, to 6 mm. long, 1 -nerved, papillate; corolla bright- 

 yellow, 10-12 mm. long, the tube less than one half the length of the entire 

 corolla; corolla lobes ovate, subacuminate, delicately veined, papillate; spurs 

 curved, horizontal or ascending, to 16 mm. long from tip to tip; anthers broadly 

 oblong, mucronate, papillate; filaments slightly obovate; capsule ovate-lanceolate; 

 seeds yellow-brown, subglobose-ovoid, granular. H. Rothrockii Gray. 



In wet mt. meadows, swampy ground, about spring-fed ponds and in moist soil 

 of coniferous forests, in N. M. (Socorro Co.) and Ariz. (Apache, Graham and 

 Cochise cos.), Aug. -Sept.; also n. Mex. 



7. Swertia L. 



More than 50 species; cosmopolitan but mainly in eastern Asia. 



1. Swertia perennis L. Felwort. Fig. 629. 



Glabrous perennial with a short rootstock and a single erect simple stem 1-3 

 dm. high; leaves mostly basal, obovate to elliptic or oblanceolate, the lower 4-12 

 cm. long with blades about equal to the broad petioles; cauline leaves few, smaller 

 than basal leaves, alternate or the upper ones opposite and sessile; panicle or 

 raceme narrow, terminal, elongate, the lowest pedicels mostly 1-4 cm. long; flowers 

 5(4) — merous; calyx lobes lanceolate, 4-5 mm. long; corolla lobes oblong-ovate, 

 mostly deep slate-blue, sometimes white-veined dorsally, obtuse, 8-10 mm. long; 

 glands 2 on each corolla lobe, round-elliptic, fringed all around; capsules ellipsoid, 

 flattened, about 1 cm. long; seeds compressed, roundish, brown, winged aibout 

 three fourths way around, about 1 mm. wide. S. palustris A. Nels. 



In wet meadows, bogs, edge of lakes and streams, grassy slopes, in N. M. 

 (San Miguel, Santa Fe and Taos cos.) and Ariz. (Apache Co.), July-Sept.; Alas. 

 s. to N. M., Ariz, and Calif.; Euras. 



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