Moist soil of river bottoms, lake shores and coastal marshes, in swamps and 

 in and about water of sloughs, ditches and ponds, and savannahs, in Okla. (Mc- 

 Curtain, Mayes, Cherokee, Woodward, Ottawa, Grady and Alfalfa cos.), in most 

 of Tex. except in the extreme w., N. M. (Chaves Co.) and Ariz. (Pima and Mo- 

 have COS.), May-Oct.; also Ont. to Minn., N.J., 111., Kan., Fla., Calif, and n. Mex. 



2. Phyla strigulosa (Mart. & Gal.) Moldenke. Diamond-leaf frog-fruit, turre 



HEMBRA, HIERBA BUENA MONTES. 



Procumbent, freely branched from the base; branches rooting at the nodes, 

 to 2 m. long, often sulcate, often reddish to purplish toward the base, gray- 

 strigillose with closely appressed antrorse hairs, the tips ascending or erect; petioles 

 1-5 mm. long, mostly winged, rather obscurely canescent-strigillose or glabrescent; 

 leaf blades mostly broadly ovate or triangular-ovate to rhomboid or ovate-elliptic, 

 mostly conspicuously widest below the middle, to 75 mm. long and 2 cm. wide, 

 rounded or acute (in outline) and at apex, abruptly acuminate at base and pro- 

 longed into the petiole, conspicuously and regularly coarse-dentate from apex 

 to the widest part with sharply acute or apiculate broadly triangular rather di- 

 vergent teeth (their margins often thick and involute), both surfaces rather densely 

 but microscopically canescent-strigillose, often plicatulate, the larger venation white 

 and very prominent beneath; peduncles 25-55 mm. long, deeply sulcate, densely 

 canescent-strigillose or glabrescent; heads 4-8 cm. long, later elongating; bractlets 

 ovate to obovate, 3 mm. long, 1 .5 mm. wide, sharply acute or acuminate, densely 

 canescent-strigose, strongly costate; corolla about 3 mm. long, white, sometimes 

 lavender- or purple-tinged in age, limb 1.5 mm. wide. Lippia strigulosa Mart. & 

 Gal., P. yucatana Moldenke. 



Fields, woods, open ground, swamps, sandy stream banks and muddy hollows, 

 in Tex. in the Rio Grande Plains and Valley, Feb. -May; widespread from Mex. 

 and Gr. Ant. through Virg. I., C.A. and S.A. 



Var. sericea (O. Ktze.) Moldenke differs in having the mature leaves to 15 mm. 

 long and 1 cm. wide. Incl. var. parviflora (Moldenke) Moldenke. In Tex. in the 

 Rio Grande Plains and Valley, Feb.-May; also Mex., Bah. I., W. I., Trin. and 

 Venez. 



3. Phyla incisa Small. Texas frog-fruit. 



Stems mostly prostrate, often swollen and rooting at the nodes, simple or 

 branched, often purplish, appressed-strigillose; branches decumbent to ascending 

 or erect, abundantly appressed white-strigose; petioles usually obsolete or 1-3 

 mm. and winged; leaf blades often thick-textured, narrow-oblong or cuneiform to 

 broadly obovate, very variable, 1-5 cm. long, 2-15 mm. wide, acute to obtuse or 

 rounded (in outline) at apex, usually with only 1 to 4 pairs of coarse and saliently 

 spreading teeth near the apex, cuneate from the middle or above the middle to 

 the base, appressed-strigillose on both surfaces with small inconspicuous white 

 hairs, secondary venation mostly obscure on both surfaces; inflorescence usually 

 much-surpassing the subtending leaves; peduncles 2-9 cm. long, appressed-strigil- 

 lose; heads at first globose, later cylindric and elongating to 3 cm., 5-10 mm. 

 wide; bractlets obovate, 2-3 mm. long, closely imbricate, acute, abundantly white- 

 strigillose; corolla white with yellow center, the tube 2-2.5 mm. long, limb 2 mm. 

 wide. Lippia incisa (Small) Tidestr. 



Open ground, fields, pastures, wet clay or sandy flats, dry river banks and 

 bottoms, floodplains, damp or wet shady woods and seashores, in Okla. (Pittsburg, 

 Kiowa and Jeff"erson cos.), practically throughout Tex., N.M. (Dona Ana, Otero, 

 Luna and Socorro cos.) and Ariz. (Apache, Yuma and Pima cos.), Mar.-Nov.; 

 Colo., Okla. and Mo. to N.M., Ariz., s. Calif, and n. Mex. 



1404 



