Acalypha 



EUPHORBIACEAE 



639 



50 



Map 1323 



Acalypha rhomboidea Raf 



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Acalypha rhomboidea 

 «ar Deamii Weatherby 



scattered in an adjoining open woods, but was not found in the thick woods. 

 Whether it was introduced into the fallow field and spread into the adjacent 

 woods, or vice versa, I do not know. 



Conn, to e. Kans., south w. to n. Fla. and cent. Tex. 



4407. ACALYPHA L. Three-seeded Mercury 



[Weatherby. The group of Acalypha virginica in eastern North Ameri- 

 ca. Rhodora 29 : 198-200. 1927. The typification of Acalypha virginica 

 L. Rhodora 39: 14-16. 1937.] 



Staminate and pistillate flowers in separate spikes; capsules prickly. . 1. A. ostryaefolia. 

 Staminate and pistillate flowers in the same spike; capsules smooth. 



Pistillate bracts deeply cut into 5-7 (rarley 9), oblong to lanceolate acute or obtusish 

 lobes; primary leaves mostly ovate to rhombic-ovate, glabrous except for scat- 

 tered, long hairs. 



Seed 1.6-1.8 mm long 2. A. rhomboidea. 



Seed 2-3 mm long 2a. A. rhomboidea var. Deamii. 



Pistillate bracts with 9-15 lobes or teeth; primary leaves mostly ovate-lanceolate to 



linear, often pubescent beneath or on both surfaces. 



Pistillate bracts rather deeply cut into mostly lanceolate, very acute lobes, hispid 



on the nerves and margins, usually not glandular; stems with at least a few 



long spreading hairs in addition to the more common incurved ones; primary 



leaves broadly to narrowly lanceolate; petioles a third to a half as long as the 



blade 3. A . virginica. 



Pistillate bracts shallowly cut into ovate or broadly deltoid lobes or teeth, sparsely 

 beset with whitish stipitate or sessile red glands or both, sometimes ciliate, 

 otherwise glabrate to coarsely pubescent; stems puberulent to pubescent with 

 only incurved hairs; primary leaves oblong-lanceolate to linear; petioles a 

 tenth to a fourth as long as the blades 4. A. gracilens. 



1. Acalypha ostryaefolia Riddell. Map 1322. Most of our specimens 

 are from truck gardens, cornfields, and fallow fields along or near the Ohio 

 River and near New Harmony. I have never seen it in any other habitat. 

 In recent years it has been introduced farther north in the state. It is 

 usually a common weed where it is found. This species seems to be ad- 

 ventive. It was first reported from Indiana in 1917 and none of the early 



