longitudinal veins

leaf blade linear to elliptic-ovate, subplicate veined, with conspicuous, transverse veins between main, longitudinal veins, glabrous.

leaf blade lanceolate or oblong, with several pairs of longitudinal veins parallel to a distinct midvein.

longitudinal veins dark violet or deep greenish brown, not raised, usually cohering at calyx teeth.

Leaf blade without an obvious midvein but with many, slender, longitudinal veins dichotomous in basal region and converging toward apex.

wings purple-red when fresh, narrow, with longitudinal veins near middle.

wings light brown, with longitudinal veins near margin.

wings narrower than seeds, ca. 3 mm wide, with longitudinal veins at middle.

Calyx narrowly campanulate, slightly inflated in fruit, 8--10(--12) mm, glabrous, longitudinal veins green or violet.

wings ca. 3 mm wide, with longitudinal veins near middle.

Calyx campanulate, 3--3. 5 mm, glabrous, longitudinal veins inconspicuous.

longitudinal veins green or violet, sparsely hirtellous and glandular hairy, inflated after anthesis;

The bracing and fusing pattern of longitudinal veins at base in living mayflies (Insecta: Ephemeroptera)

longitudinal veins violet, inconspicuous, cohering at apex;

longitudinal veins dark violet or green, densely hirtellous-glandular hairy;

longitudinal veins violet or dark violet, cohering at apex, with violet glandular hairs;

longitudinal veins violet, cohering at apex, glandular hairy;

septum complete, membranous, without 2 longitudinal veins;

longitudinal veins dark violet, hairy;

longitudinal veins dark violet, not cohering at apex;

valves with 3-7, prominent, longitudinal veins, thin or thick and obscurely veined;

Calyx campanulate, (6--)8--10 mm, densely glandular villous, base rounded, longitudinal veins violet;

Nutlet yellowish green, subglobose or ellipsoid, 3. 5-4 mm, sometimes with forked longitudinal veins (or ridges);

Ovary stalk ca. 2 mm. Nutlet subglobose, 5-6 mm in diam. , with conspicuous longitudinal veins (ridges);