Nettles

.....	obvious stinging hairs:	.....	without stinging hairs:	.....
	opposite-lvd	alternate-lvd	opposite-lvd	alternate lvd
panicles, spikes or head-like clusters from the upper axils	stinging nettle (1.Urtica) slender, drooping clusters (0 4 4 0/0 2+2 0 1)	.....	.....	.....
staminate fls in cymes from the lower axils; pistillate in loose, elongate, spreading cymes from upper axils	.....	wood nettle (2.Laportea) stining hairs on fl stalks slender, drooping clusters (0 5 5 0/0 4 0 1)	.....	.....
fls in axillary spikes; in ball-like clusters in continuous or interrupted axillary clusters	.....	.....	false nettle (3.Boehmeria) (0 4 4 0/0 2-4 0 1)	.....
fls in axillary panicles or glomerules; like 2 catkins forming a U-shape in axils	.....	.....	clearweed (4.Pilea) (0 4 4 0/0 3 0 1)	......
axillary clusters	.....	.....	.....	pellitory (5.Parietaria) (0 4 4 0/0 4 0 1)