in each locule, more or less vertical, 1-1.3 mm. long, each firmly embedded in a 

 coherent cube of woody endocarp 1.2-1.5 mm. high, 1-1.2 mm. thick, the endo- 

 carp firmly fused to the capsule wall. Jussiaea uruguayensis Camb., J. Michauxiana 

 Fern. 



Wet places, as along ponds and ditches, in irrigation canals and in water in lakes 

 and ponds, in Okla. {Waterfall) and scattered in s.e. Tex., June-Oct.; s.e. U.S. 

 and scattered s. to n. Arg. and introd. elsewhere. 



6. Ludwigia hirtella Raf. Spindle-root. Fig. 556. 



Erect hirsute herb with fascicled ovoid to spindle-shaped roots, to 1 m. tall; 

 leaves narrowly lanceolate, 1.5-6 cm. long, 3-18 mm. wide, essentially sessile; 

 sepals 4, 7-10 mm. long; petals 10-15 mm. long; stamens 4; disk strongly elevated, 

 a depressed white-ciliate nectary surrounding the base of each epipetalous stamen; 

 capsule subglobose-cubical, 4-6 mm. long and thick, dehiscent by a terminal pore, 

 the pedicel 4-8 mm. long; seeds in several indistinct rows in each locule, about 

 0.6 mm. long, free. 



Rare along wet places in pine woods, on seepage slopes, in bogs and wettish 

 savannahs, in Okla. (McCurtain Co.) and e. Tex., June-Sept.; e. along Coastal 

 Plain to Fla. and N.J. 



7. Ludwigia alternifolia L. Seed-box, rattle-box. Fig. 557. 



Erect subglabrous or puberulent herb with fascicled spindle-shaped roots, to 

 12 dm. tall; leaves lanceolate, 4-8 (-12) cm. long, 8-15 (-24) mm. wide, the 

 petiole 3-7 (-10) mm. long; sepals 4, 7-10 mm. long; petals 8-10 mm. long; sta- 

 mens 4; disk strongly elevated, a depressed white-ciliate nectary surrounding the 

 base of each epipetalous stamen; capsule subglobose-cubical, 5-6 mm. long and 

 thick, dehiscent by a terminal pore, the pedicel 3-5 mm. long; seeds in several indis- 

 tinct rows in each locule, 0.6-0.7 mm. long, free. Incl. var. puhescens Palm. & 

 Steyerm. 



Occasional along ditches and in wet places, in marsh-meadows, seepage areas, 

 in sluggish streams and on the edge of pools and lakes, in Okla. (McCurtain, Adair, 

 LeFlore, Haskell and Sequoyah cos.) and e. Tex., June-Aug.; Mass and Ont. to 

 n. Fla., e. Tex. and la. 



8. Ludwigia linearis Walt. Fig. 558. 



Glabrous to puberulent erect usually well-branched herb to 1 m. tall; leaves 

 linear to narrowly elliptical, 2.5-6 cm. long, 1.5-5 mm. wide, subsessile; sepals 4, 

 2.5-4 mm. long; petals 3.5-5 mm. long; stamens 4; disk elevated, glabrous, 

 prominently 4-lobed, the lobes opposite the petals; capsule elongate-obpyramidal, 

 6-8 mm. long, irregularly loculicidal, sessile; seeds in several indistinct rows in each 

 locule, about 0.6 mm. long, free. Incl. var. pubenda Engelm. & Gray. 



Occasional in wet places, especially in pine woods, on seepage slopes, in ditches 

 and wet savannahs, in ponds and bogs, in s.e. Tex., June-Sept.; e. to n. Fla., 

 Tenn. and N.J. 



9. Ludwigia pilosa Walt. Fig. 556. 



Pilose erect usually well-branched herb to 12 dm. tall; leaves linear to elliptical, 

 2-10 cm. long, 3-15 mm. wide, the petiole 1-5 (-15) mm. long; sepals 4, 4-5 mm. 

 long; petals absent; stamens 4; disk elevated, glabrous, prominently 4-lobed. the 

 lobes opposite the sepals; capsule cubic-globose. 3-4 mm. long and thick, irregu- 

 larly loculicidal, sessile; bracteole 2.5-4.2 mm. long; seeds in several indistinct rows 

 in each locule, about 0.5 mm. long. 



Occasional in wet places, especially in pine woods, in bogs, seepage areas, 

 marshes, wet savannahs and wet soil about ponds and lakes, in s.e. Tex., July-Oct.; 

 e. along the Coastal Plain to n. Fla. and s. Va. 



1184 



