Flora of North America species comparison

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Silphium albiflorum

white rosinweed
Habit Plants scapiform, 20–75 cm; taprooted.
Stems

terete, glabrous, hirsute, hispid, or scabrous.
Leaves

basal persistent, petiolate;

cauline usually alternate, rarely subopposite, petiolate or sessile;

blades deltate, elliptic, linear, ovate, or rhombic, 2–40 × 1.5–26 cm, sometimes (proximal) 1–2-pinnately lobed, bases attenuate, cuneate, or truncate, ultimate margins unevenly toothed or entire (distal blades), apices acuminate to apiculate, faces scabrous to hirsute.
Ray florets

14–30;

corollas white.
Disc florets

70–130;

corollas white.
Phyllaries

23–36 in 2–3 series, outer reflexed, apices acuminate, abaxial faces hispid.
Cypselae

12–26 × 7–12 mm;

pappi 2–5 mm.

Silphium albiflorum
Phenology Flowering late spring–summer.
Habitat Prairies, open fields, calcareous soils
Elevation 100–500 m (300–1600 ft)
Distribution
from FNA
TX
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 21, p. 78.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Ecliptinae > Silphium
Sibling taxa
S. asteriscus, S. brachiatum, S. compositum, S. glutinosum, S. integrifolium, S. laciniatum, S. mohrii, S. perfoliatum, S. radula, S. terebinthinaceum, S. wasiotense
Name authority A. Gray: Proc. Amer. Acad. Arts 19: 4. (1883)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Fabaceae, Apiaceae, Boraginaceae, and Polemoniaceae.)

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