Rosa transmorrisonensis Hayata

Climbing shrubs. Twigs thin, glabrous, prickles 2 under each leaf, up to 7 mm. Leaves up to 5 cm, glabrous, free part of petiole 1-4 mm long. Stipules adnate over c. 5 mm, wings c. 1.2 mm wide, free tips c. 3 mm long, margins fimbriate and with glandular teeth. Leaflets (5 or) 7, lateral ones elliptic, apical one larger than lateral ones, 8-15 by 4-6 mm, margin finely serrate, lateral petiolules up to 1 mm, apical one up to 4 mm. Flowers solitary, terminal on short and leafy laterals, rarely also 1 or 2 in the upper \zd£-2xi\s.Pedicels up to 1 cm long, glabrous, not glandular. Closed flowerbuds globular, mucronate. Hypanthium ellipsoid, c. 4 by 2.5 mm, glabrous and without glands outside, hairy inside. Sepals reflexed in anthesis, ovate to elliptic, acuminate, 6-7 by 2.5-3.2 mm not including the 1-3 mm long acumen, glandular and with 1-3 side-lobes on the exposed margins, glabrous outside except parts covered in bud. Petals obovate, up to 11 mm long, retuse, white. Stamens c. 100, filaments up to 5.5 mm, anthers c. 1.2 mm long. Pistils c. 12, ovary spindle-shaped, with a plume of long silky hairs near apex, styles c. 5 mm long, firmly cohering, glabrous. Hips and achenes not seen.