Rayjacksonia phyllocephala
Rayjacksonia aurea
camphor daisy, Gulf Coast camphor-daisy
Houston camphor-daisy, Houston tansyaster
blades oblong to oblanceolate, mid-cauline (2.5–)4–13 mm wide.
blades linear to linear-oblanceolate, mid-cauline 1–3(–4) mm wide.
(6–)10–15 × 12–30 mm.
4–7 × 10–15 mm.
17–38;
corollas 8.5–19 mm.
14–19;
corollas 6.5–9.5 mm.
corolla tubes longer than limbs.
corolla tubes ± equaling limbs.
in 3–4 series, loose, subequal, apices erect to spreading, 1.3–1.7 mm wide, herbaceous.
in 4–5 series, tightly appressed, strongly unequal, apices erect to slightly spreading, ca. 1 mm wide, herbaceous.
essentially sessile, often surpassed by distal leaves that continue to very base of heads.
on short, sometimes bracteate peduncles, not surpassed by distal leaves.
= 12.
= 12.
Rayjacksonia phyllocephala
Rayjacksonia aurea
Of conservation concern.
Rayjacksonia aurea is now restricted to a few, small populations in the vicinity of Houston. It is in the Center for Plant Conservation’s National Collection of Endangered Plants.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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