What is the typical flower structure seen in Tridens spp.?

Tridens spp., commonly referred to as some types of bluestem grasses, characteristically feature spikelets that are 4-12 flowered with glumes that are 1-nerved. This structure is essential for identification, as the arrangement and number of flowers within a spikelet can significantly differentiate between species. The presence of glumes that are 1-nerved is indicative of the specific physiological and structural traits of these grasses, helping to narrow down their classification within the family Poaceae.

The other options describe flower structures that do not align with the characteristics of Tridens spp. For instance, single-flowered spikelets or compact, ball-shaped flower heads are traits more associated with other genera of grasses or completely different plant families. Additionally, globular clusters of florets on long stems would connect more closely with flower structures seen in plants like certain composites, rather than the spikelet formation typical of Tridens. Recognizing these unique features is integral for accurate plant identification in wildland contexts.