What is the fine-grained topic of the following text: Glumes oblong, glabrous, midveins about equal in length and prominence to the lateral veins, apices truncate, margins about 0.5 mm wide, hyaline; lower glumes 6.5-10 mm, keeled, keels occasionally scabrous distally; upper glumes 7-10 mm; lemmas 9-12 mm, glabrous; paleas 7.5-11 mm, keeled, keels ciliate; anthers 4-6 mm. Only return the topic.
Plant anatomy description