Test on Grass Morphology and Species Identification

Question 1: The upper glume of Paspalum dilatatum is cartilaginous.

A. Ano

B. Ne

Explanation: The upper glume of Paspalum dilatatum is membranous.

Question 2: Which of the following describes the leaf-blade surface of Paspalum atratum?

A. Glabrous

B. Pilose

C. Striate

D. Granulose

Explanation: According to the study materials, the leaf-blade surface of Paspalum atratum is described as glabrous, or pilose. Striate and granulose describe the lemma surface of other Paspalum species.

Question 3: Cynodon nlemfuensis is distributed across all regions of Asia.

A. Ano

B. Ne

Explanation: The study materials specify the distribution of Cynodon nlemfuensis in Asia as 'Asia - temperate: Arabia', not all regions of Asia.

Question 4: Which of the following characteristics accurately describe the fertile floret and fruit of Cynodon dactylon?

A. The fertile lemma is 2 – 2.5 mm long, cartilaginous, and has a pubescent midvein.

B. The palea has 2 veins and its keels are eciliate.

C. The fertile lemma is 2.5 – 3 mm long and its midvein is ciliate.

D. The fruit is a caryopsis with an adherent pericarp.

Explanation: According to the study materials for Cynodon dactylon: The fertile lemma is 2 – 2.5 mm long, cartilaginous, and its midvein is pubescent. The palea has 2 veins and its keels are eciliate. The fruit is described as a caryopsis with an adherent pericarp. Option 2 describes a fertile lemma length and midvein characteristic not specific to C. dactylon, as C. plectostachyus has a lemma length of 2.5 – 3 mm and a ciliate midvein.

Question 5: The fertile lemma surface of Brachiaria dictyoneura is granulose.

A. Ano

B. Ne

Explanation: The study materials state that the lemma surface of Brachiaria dictyoneura is papillose, not granulose.