ADICEA 9 



vestitus, erectus vel in solo incurvatus, 1-3 dm. altus, crassus, 

 exigue et appresse pilosus vel glabratus, pellucidus. Folia opposita 

 gemina 3 caulem et gemina 3 apicem frequenter occupantia, 

 succulenta (siccata membranacea), 2-6 cm. longa, 1-4 cm. lata 

 (ramorum 1-2 cm. longa, 0.5-1.5 cm. lata), ovata, breviter vel 

 nequaquam acuminata, dentibus 59 crasse crenato-serrata, 

 cuneata vel basi rotundata, 3-nervata. Florum cymi 5-6 in caule, 

 I vel 2 in ramis congest!, in axillis foliorum brevi-pedunculati, 

 petiolis subtendentibus breviores. Pedunculi, pedicelli, sepala 

 hyalino-marginati. Achaenia, aliquantulum aspera vel tuber- 

 culata, ovata, subplana, 2 mm. longa, 1.5 mm. lata, acutula. 



Stem annual, simple or with 1-3 pairs of short, ascending 

 branches, opposite and growing from the leaf axils, erect or bent 

 on the ground, and in the latter case having the lower side covered 

 with rootlets penetrating the loose soil or the moss, 1-3 dm. high, 

 fleshy, sparingly appressed-hairy or glabrate, pellucid. Leaves 

 opposite, usually 3 pairs along the stem and 3 pairs at the top, 

 watery (after drying membranous), 2-6 cm. long, 1-4 cm. wide 

 (those of the branches 1-2 cm. long, 0.5-1.5 cm. wide), ovate, 

 shortly or not at all acuminate, coarsely crenate-serrate with 

 5-9 teeth, cuneate or rounded at base, 3-nerved with the lateral 

 nerves ending in the 2nd tooth, with i pair of petioles as long 

 as the blades, the others shorter. Flower clusters 5-6 on the stem, 

 I or 2 on the branches, short-peduncled in the leaf axils, shorter 

 than the subtending petioles. Peduncles, pedicels and sepals 

 with hyaline margins. Achenes with or without a greenish blush, 

 somewhat roughish or tuberculate, ovoid, flattened, 2 mm. in 

 length and 1.5 mm. in width, acutish. 



In measuring the seeds as well as all the other parts of this 

 and the preceding species, care was taken to use only full-grown 

 plants, collected at the end of the season, and seeds that had 

 dropped spontaneously from their receptacles. 



The plant grows in damp, but drained soil, well shaded, some- 

 what distant from the rill where the preceding species thrives. 

 Both of them enjoy luckily such natural advantages that there 

 seems to be no danger of their extermination, as is the case with 

 prairie plants. They don't need to fear the plow or the pasturing 

 cattle which apparently has no appetite for them. They are 

 fairly well established, sufficient in numbers to fill the wants of 

 even a score of botanists, without visible lessening of the supply — 



