Rubia akane is
a perennial vine herb common in fields and mountains. Stems branch
well, with downward-facing prickles, and leaves are 3-7cm long, in a
triangular-ovate or oblong-ovate shape, with tips gradually becoming
narrow to points, and bases are cordate. Two leaves in a whorl of
four originate in significantly-developed-into stipules. As with the
stems, the downward prickles are observable on petioles and leaves'
backside veins. Flowers, yellow-green, come in cymes that emerge
from axils. Boom time: August-October.