3.Stem succulent, simple or divaricately branched from middle, lower nodes swollen, naked.
茎肉质,单或中间枝,下部节膨胀,裸露。
4.Stem conspicuously striate or tetragonous, robust, succulent, simple or branched in upper part.
茎显著具条纹或4棱,粗壮,肉质,单一或枝在上半部。
5.They branched off from the main road and turned down a country lane.
他干道, 转入乡间小路。
6.Caudex branched, erect, to 2 cm in diam.Caudex leaves scalelike, triangular to subtriangular.
块根枝,直立,在2厘米直径块根鳞片状,到近三角形三角形。
7.Herbs annual or biennial.Root stout, tuberlike, and napiform or fusiform, or branched and not tuberlike.
一年生或二年生草本根粗壮,管状,和芜菁状孔或纺锤形,或枝而不管状。
8.Stems caespitose, simple or many branched, 60-150 cm tall, ca. 1 cm in diam., antrorsely setulose, armed with spreading stinging hairs, dense in lower parts, sparser in upper parts.