1896.) North American Amaranthacee. 353 
specimens described as /. Jara by Watson are like cer- 
tain specimens which he called J. /atifolia, agreeing also with 
those sheets from other herbaria labelled J. latifolia, which 
leads us to believe there is no distinction of species here. 
Mexico, Lower California. 
++ Plants mostly glabrous. 
IRESINE INTERRUPTA Benth. Bot. Voy. ‘‘Sulphur” 156. 1844. 
Alternanthera Richardii Moq. |. c. 353. 1849. 
Suffruticose, erect, glabrous: leaves bright green and also 
glabrous: primary branches of inflorescence opposite and 
widely divaricate; secondary alternate, loosely set with 
spikelets of small unisexual flowers, the rachis and base of 
the flowers pilose: staminodia broad, dentate at summit. 
Mexico. 
_IRESINE PANICULATA (L.) Kuntze Rev. Gen. Pl. 454. 1891. 
Tresine celosioides L.. Sp. Pl. 1456. 1762. 
Mostly glabrous erect annuals or perennials according to 
labitat, those of the southwestern desert regions with stronger 
tendency to the latter: stem nerved or angled, often swol- 
‘iat the joints; plant diffusely branching, often with small 
indeveloped branchlets in the axils of leaves: leaves petioled, 
‘apering at both ends, ovate to lance-linear: inflorescence 
Paniculate, always with reduced green leaves subtending the 
larger branches; spikelets oblong or linear, seldom pedicellate 
and never properly glomerate: in the male flowers there are 
fostly five stamens (sometimes only three?): staminodia if 
Present very minute: usually no rudimentary ovary: sepals o 
iss 
Sines, 
Widely distributed over the southern half of the United 
tates from Atlantic coast to New Mexico and south. Not 
Ported north of Kentucky, Arkansas and southern Kansas. 
IRESINE PANICULATA, var. Floridana, n. var. 
Diffusely branching from a woody base, branches ascend- 
"8 and equal: roots long and fleshy: nodes crowded, less than 
