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2-3 mm long absent Acad achenes acuminate acute Annual apex appressed Arizona ascending axillary basal leaves base beak bracts branches British Columbia California calyx capsule carpels cauline leaves clusters cm long cm tall Colorado conspicuously culms cuneate cymes densely Flowering from April Flowering from June fruit glabrate glabrous glandular globose glumes green ground herbs hypanthium inflorescence involucres June to August June to September labellum lanceolate leaf blades flat leaflets lemmas lobes margins Mexico Mexico and Arizona nearly oblanceolate oblong obovate obtuse Original Citations ovary ovate panicle pedicels peduncles Perennial perianth perigynia petals petioles pilose pinnae pistillate Plants puberulent pubescent racemes rachis Range rhizomes Rocky slopes Rydb scabrous scales seeds sepals sessile sheaths Shrub slender solitary sometimes southcentral southern southward sparsely spikelets spikes spreading stamens Standl stems erect stigmas styles subsp subtended terminal tomentose toothed Torrey Club upper surface usually villous Western Texas wide widespread yellow