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FNA | Family List | FNA Vol. 7 | Brassicaceae | Streptanthus

23b. Streptanthus insignis Jepson subsp. lyonii Kruckeberg & J. L. Morrison, Madroño. 30: 234, fig. 3. 1983.

Racemes: terminal cluster of sterile flowers pale yellow or purplish. Flowers: sepals of fertile ones greenish yellow or purplish; petals lemon yellow or yellowish white. Fruit valves moderately to densely hispid. 2n = 28.

Flowering Apr-May. Serpen- tine outcrops in arid grassland, oak woodland; of conservation concern; 200-900 m; Calif.

Subspecies lyonii is known from Merced County.

Kruckeberg and Morrison described subsp. lyonii based on plants with an exclusively greenish yellow terminal cluster of sterile flowers, and discussed a sympatric form with greenish yellow sepals and a purple terminal cluster as a ‘bicolor’ form. Subsequent collections show that plants with only a greenish yellow terminal sterile cluster are absent in some years, and the ‘bicolor’ form is here included in subsp. lyonii.


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