Fallopia palaeodonica Doweld Phytotaxa, 308(1): 66. 2 Jun 2017
- Fallopia palaeodonica
- Generic Name
- [Genus] Fallopia
- Authors (Pub.)
- Doweld A. B.
- New names in Fallopia, Persicarioipollis, Polygonum and...
- Page number
- Fossil Status
- Krynka river, right tributary of Mius river, Matveev-Kurgan district, Rostov region, Russian Federation
- Eurasia (Europe)
Data for Holotypus
- Komarov Botanical Institute, Russian Academy of Sciences, St.-Petersburg, Russian Federation
- Repository Number
- Leaves widely rounded, 8 × 7.5 cm; the base slightly sinuate and decurrent, with obtuse scallops; midvein 1 mm thick (at the leaf base) to 0.5 mm thick (in the leaf middle part), secondary and basal veins filiform; basal veins diverged at 45° from the midvein, then slightly curved, with a thin veinlet parallel to the margin (one leaf side) and thin infrabasal veinlet parallel to the basis margin (another leaf side). Basal veinlets as secondary veinlets ended in looplike anastomoses, which in secondary veinlets separated from the leaf margin by a series of large loops. Secondary veinlets (6–7 pairs at the base) somewhat connivent, diverged at 45–50° from the main vein, in the middle of leaf they apart and diverged at large angle; there are numerous intercalated veinlets between them. Tertiary veinlets, spiderweblike, oblique to secondary veinlets.