Seed unit.

CFR · 2024-01-01 · US · Title 7

The seed unit is the structure usually regarded as a seed in planting practices and in commercial channels. The seed unit may consist of one or more of the following structures: (a) True seeds; (b) For the grass family: (1) Caryopses and single florets; (2) Multiple florets and spikelets in tall oatgrass (Arrhenatherum elatius), oat (Avena spp.), gramas (Bouteloua spp.), rhodesgrass (Chloris gayana), barley (Hordeum vulgare), and bluegrass (Poa spp.); (3) Entire spikelets in bahiagrass, bentgrasses, dallisgrass, guineagrass, browntop millet, foxtail millet, proso millet, panicgrasses, redtop, rice, switchgrass, and vaseygrass. Entire spikelets which may have attached rachis segments, pedicels, and sterile spikelets in big bluestem, little bluestem, sand bluestem, yellow bluestem, bottlebrush-squirreltail, broomcorn, yellow indiangrass, johnsongrass, sorghum, sorghum- sudangrass, sorghum almum, sorgrass, and sudangrass; (4) Spikelet groups: (i) Spikelet groups that disarticulate as a unit in galletagrass; (ii) Spikelet groups that disarticulate as units with attached rachis and internodes in bluestems, side-oats grama, and yellow indiangrass; (5) Fascicles of buffelgrass (Cenchrus ciliaris) consisting of bristles and spikelets; (6) Burs of buffalograss (Bouteloua dactyloides); (7) Bulblets of bulbous bluegrass (Poa bulbosa); (8) Multiple units as defined in § 201.51a(b)(1). (c) Dry indehiscent fruits in the following plant families: Buckwheat (Polygonaceae), sunflower (Asterac

official document · source cfr-2024 · id 7:§ 201.47a