146 EVENING-PEIMEOSE FAMILT. 



J. graildifl6ra. Marshes S. ; hairy, with stems erect from a creeping 

 base, lanceolate acute leaves, flowers 2' in diameter, the 5 calyx lobes only half 

 as long as the petals, and pods cylindrical and stalked. 11 



J. ripens. In water from S. 111. S. : smooth, with creeping or floating 

 and rooting stems, oblong leaves tapering into a slender petiole, longrpeduncled 

 flowers 1' or more across, with 5 calyx-lobes, the cylindrical or club-shaped pods 

 tapering at the base. y. 



9. LUDWiGIA, FALSE LOOSESTRIFE. (Named for C. G. Ludtvig, 

 a German botanist, rather c*lier than LinniEus.) Marsh herbs, with entire 

 leaves ; flowers seldom handsome, in summer and autumn. 7/. '■ 



§ 1. Leaves alternate, mostly sessile, 



• Flowers peduncled in the upper axils, ivith yellow petals {about J' long) equalling 



the leglike ovate or lance-ovate calyx-lobes : stamens and styles slender : 

 ' ' podcumcfil,strongly i-angled, opening byaholeatthetop : stems 2°-3°higk. 



L. alternifdlia. Common E., the only one found far N. : smoothish, 

 branching, -vyith lanceolate leaves . tapering to "both ends, petals scarcely longer 

 than calyx, and angles of pod wing-margined. ^ . 



Ii. Virg&ta. Pine barrens S. : downy, with mostly simple stems, blunt 

 oblong leaves or the upper linear and smaller, and petals twice the length of the 

 reflexed calyx. 



L, hirtella. Pine-barrens from New Jersey S. : hairy, with simple stems, 

 oblong or lanceolate short and blunt leaves, and petals twice as long as the 

 barely spreading calyx-lobes. 



# » Flowers sessile in the upper axils, small, and with pale yellpw petals about the 



length of the persistent calyx-lobes : stamens and style short : leaves on 

 flowering stems narrow and linear. • '■ 



L. linearis. Swamps from N. Jersey S. : smooth, loosely branched, 1° -3° 

 high, with acute leaves on the flowering stems, but obovate ones on creeping 

 runners ; pods oblong-clubshapcd or top-shaped and much longer than the tri- 

 angular-ovate calyx-lobes. 



L. Iinif61ia, only S., is 6'- 12' high, with blunter leaves, and cylindrical 

 pods little longer than the lanceolate calyx-lobes. 



» * » Flowers sessile, often clustered, and with no petals, or rarely mere rudi- 

 ments : leaves mostly lanceolate, some species with obovate or spatulate leaves 

 on creeping runners : flowering stems mostly 2° - 3° high. 

 I-, Downy all over: flowers spiked or crowded at the end of the branches. 



L. pildsa. Only S. : much branched, with' lance-oblong leaves, and glob- 

 ular-4-sided pod about the length of the spreading calyx-lobes. 

 •<- -1- Smooth or smoothish throughout. 



Ii. cyllndrica. From Illinois and N. Car. S. : much branched, With long 

 lanceolate and acute leaves tapering into a petiole, small axillary flowers, and 

 cylindrical pods much longer than the small calyx-lobes. 



L. spbseroc&rpa. From E. New England S. : with lanceolate or linear 

 leaves acute at both ends, vei-y small flowers in the axils, and globular pods not 

 longer than the calyx-lobes, with hardly any bractlets at their base. 



£. polye&.rpa. From Michigan S. : like the last, but smoother, and with 

 conspicuous slender bractlets at the base of the 4-sided rather top-shaped pod, 

 which is longer than the calyx-lobes. 



L. capit^ta. From if. Carolina S. ; with slender simple stems angled 

 towards the top, long lanceolate leaves ; flowers mostly crowded in an oblong or 

 roundish terminal head, and obtusely 4-angled pod longer than the calyx-lobes. 



L. alkta,. ]}Vom N. Carolina S. : \vith simple or sparingly branched stems 

 strongly angled above, few flowei's, in the axils of the upper wedge-lanceolate 

 leaves, and an inversely pyramidal pod as long as the white calyx-lobes, with 

 concave sides and winged angles. 



L. microcdrpa. From N. Carolina S. : the low stems creeping at base 

 and 3-angled above, leaves spatulate of obovate, with minute flowers in their 

 axils, Ohe short 4-togled pods not larger than a pin's head. 



