What is the fine-grained topic of the following text: Leaves including petiole 2.2–6 cm; stipules broad, mostly adnate to petiole, free parts ovate, rarely lanceolate, glabrous, margin glandular serrate, apex acuminate; rachis and petiole sparsely glandular-pubescent and shortly prickly; leaflets 5–7, rarely 9, suborbicular, ovate, or obovate, 6–18 × 4–15 mm, abaxially sparsely puberulous along veins or glandular-pubescent, adaxially glabrous, base subrounded, margin doubly serrate, teeth often glandular apically, apex rounded-obtuse or truncate. Only return the topic.
Leaf morphology and characteristics