Aureolaria grandiflora
Aureolaria pedicularia
large-flower yellow false foxglove
fern-leaf false foxglove, fernleaf yellow false foxglove
simple or branched, 5–15 dm, white-puberulent.
simple or branched, 4–10 dm, glabrous, white-pubescent, or sparsely glandular-pubescent.
petiole 8–18 mm;
blade lanceolate, 50–105 x 30–40 mm, margins pinnatifid and serrate, rarely serrate and not pinnatifid, surfaces puberulent.
petiole 3–5 mm;
blade lanceolate, 12–70 x 8–30 mm, margins pinnatifid (less than 1/2 to midvein) to 2-pinnatifid, first sinus deeper than second when both present, surfaces glabrous, rarely white-pubescent.
leaflike, 15–22 x 3–7 mm, margins serrate to weakly pinnatifid at base.
leaflike, 9–15 x 4–6 mm, margins pinnatifid to (rarely) 2-pinnatifid.
4–11 mm, puberulent.
(2–)8–13 mm, pubescent to glandular-pubescent.
calyx puberulent, tube campanulate, 6–10 mm, lobes linear to lanceolate, 3–12 x 1–4 mm, margins entire;
corolla tube 30–40 mm, glabrous, lobes 7–11 x 10–16 mm;
filaments 13–27 mm, ciliate;
style 29–35 mm.
calyx pubescent and/or glandular-pubescent, tube turbinate, 4–8 mm, lobes linear, sometimes narrowly lanceolate, 4–12 x 1–3 mm, margins crenate to pinnatifid;
corolla tube 17–32 mm, glabrous or sparsely pubescent, lobes 8–16 x 5–13 mm;
filaments 15–22 mm, ciliate;
style 25–27 mm.
pyriform, 10–16 x 8–12 mm, glabrous.
ellipsoid, 10–13 x 5–6 mm, hispid.
= 28.
Aureolaria grandiflora
Aureolaria pedicularia
J. C. McFeeley and E. P. Roberts (1974) documented Aureolaria grandiflora, typically a parasite of oaks, parasitizing Juniperus virginiana in addition to oak species. F. W. Pennell (1935) recognized four infraspecific taxa within A. grandiflora, differentiated on subtle characteristics (for example, bract margins serrate versus more deeply cut, leaf blade margins more versus less pinnatifid). Additionally, he recognized these infraspecific taxa at both the varietal and subspecific ranks (at different times). No infraspecific taxa are recognized here.
There is a historic record of Aureolaria grandiflora from Houston County, Minnesota, collected in 1899.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Species of Aureolaria typically parasitize oaks (Quercus spp.); two studies have documented A. pedicularia parasitizing non-oak species: Pinus taeda and Vaccinium arboreum (L. J. Musselman and H. E. Grelen 1979), and unidentified Ericaceae (C. R. Werth and J. L. Riopel 1979). In a study of seed coat morphology of Aureolaria and some related genera, A. pedicularia was documented to be the only species in the genus with unwinged seeds (J. M. Canne 1980). F. W. Pennell (1935) recognized five infraspecific taxa within A. pedicularia based on subtle characters (for example, stem distally closely pubescent, not or only slightly glandular, and leaves puberulent, scarcely or not glandular, versus stem distally glandular-pubescent to hirsute, and leaves glandular puberulent to pubescent). He recognized these infraspecific taxa at both the varietal and subspecific ranks (at different times). No infraspecific taxa are recognized here.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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