White-flower Navarretia - Navarretia leucocephala
Stems hairy below heads, hairs recurved. Leaves 1-2 times pinnate; lobes linear, lower leaves glabrous, upeer ones hairy at base. Inflorescence: outer bracts leaf-like, lobes needle-like, 2-4 branched at base, lobes near tip 2, shorter, entire, pointed tipward; inner bracts simplerl, base membranous-winged, ciliate, width of wing greater than midrib. Flower: Calyx ribs glabrous or slightly hairy, tapered, gland-dotted below, membrane truncate, ciliate; corolla 4-10 mm, lobes with 1 vein entering base; stames exserted; stigmas 2, minute. Fruit transluscent, adhering to seeds until wet (Day, 1993, The Jepson Manual).
Subspecies minima, the only one know for MT, can be distinguished from others by the following characters (Day 1993): Stems 2-8 cm; inflorescence 1-2 cm wide, bracts less than 2 times length of the head, lobes 3-4 branches on back. Flower: Calyx ribs generally toothed; corolla white, generally included, throat <2 mm wide, lobes lienar; style included or slightly exserted. Seeds 1-6.
Said to occur in vernal pools (Day 1993) but this may not apply to MT specimens.
- Additional ReferencesLegend: View Online Publication
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- Lesica, P., M. T. Lavin, and P. F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.