1.
Neslia paniculata
(Linnaeus) Desvaux, J. Bot. Agric. 3: 162. 1815.
Ball-mustard
Myagrum paniculatum
Linnaeus, Sp. Pl. 2: 641. 1753
Plants
sparsely to moderately pubescent, fruits glabrous.
Stems
(1.4-)2.5-7.5(-9) dm.
Basal leaves
shortly petiolate; blade oblanceolate to oblong, 2-7.5 cm × 5-20 mm.
Cauline leaves:
blade lanceolate, narrowly oblong, or linear-lanceolate, (1.5-)2.5-7(-9) cm × (2-) 3-15(-25) mm, apex acute or acuminate, surfaces sparsely pubescent, trichomes mostly forked.
Fruiting pedicels
straight or slightly curved upwards, (4-)6-10 (-14) mm.
Flowers:
sepals 1.5-1.7 × 0.5-0.7(-1) mm; petals 2-2.5 × 0.5-0.7(-1) mm; filaments 1.5-2 mm; anthers 0.2-0.4 mm.
Fruits
(1.7-)2-2.2 × (2-)2.2-2.5 mm; style slender, 0.5-0.9 mm.
Seeds
1.2-1.4 × 1-1.1 mm.
2
n
= 14.
Flowering May-Sep. Fields, grassy mountain slopes, plains, roadsides, cultivated fields; 0-1000 m; introduced; Alta., B.C., Man., N.B., Nfld. and Labr. (Nfld.), N.W.T., N.S., Ont., Que., Yukon; Alaska, Conn., Ind., Maine, Mass., Mich., Minn., Mont., N.H., Ohio, Pa., Vt.; Europe; Asia; n Africa; introduced also in South America (Argentina), Australia.
