Flora of North America species comparison

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Bahiopsis
Habit Shrubs, 50–150 cm.
Stems

ascending to erect, much branched.
Leaves

mostly cauline; alternate or opposite;

petiolate or sessile;

blades usually 3-nerved (from at or near bases), deltate, deltate-ovate, lanceolate, lance-ovate, or ovate, margins entire or toothed to laciniate, faces hispid, sericeous, or strigillose, often resinous or gland-dotted.
Involucres

campulate to hemispheric, (9–14 ×) 4–7 mm.
Receptacles

convex, paleate (paleae tan, conduplicate, apices acute).
Ray florets

8–15, neuter;

corollas yellow (2–3-lobed).
Disc florets

40–50+, bisexual, fertile;

corollas yellow, tubes shorter than campanulate throats, lobes 5, triangular (style branches relatively slender, apices acute).
Phyllaries

persistent, 16–28 in 2–3 series (unequal, bases ovate to lance-ovate, indurate, apices abruptly narrowed, herbaceous).
Heads

radiate, borne singly or (3–25+) in ± thyrsiform arrays.
Cypselae

(brown to black) ± compressed, ± 3- or 4- angled, often obpyramidal, ± strigose;

pappi persistent, of 2(–6) lacerate, aristate scales (1–2.8 mm) plus (0–)2–6 lacerate scales (0.2–1 mm).
x

= 18.

Bahiopsis
Distribution
sw United States; nw Mexico
[BONAP county map]
Discussion

Species 12 (3 in the flora).

Although traditionally included within Viguiera, the species of Bahiopsis differ by their distinctive base chromosome number and form a basally diverging clade in subtribe Helianthinae, based on molecular data. Morphologically, they are most similar to Calanticaria, another segregate of Viguiera that is Mexican in geographic distribution, from which they differ by their branched capitulescences and having phyllaries in which the apical herbaceous portions are longer.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
1. Leaves lanceolate to lance-ovate, margins ± laciniate, abaxial faces strigillose (resinous, shiny)
B. laciniata
1. Leaves deltate, deltate-ovate, or ovate, margins entire or serrate (not incised or laciniate-toothed), abaxial faces hispid, or sericeous (not shiny)
→ 2
2. Leaf blades 1–3.5 cm, margins usually toothed, faces: abaxial hispid and gland-dotted (and slightly reticulate), adaxial scabrous (bases of hairs notably enlarged)
B. parishii
2. Leaf blades 2.8–9 cm, margins entire, faces: abaxial sericeous and gland-dotted (andstrongly reticulate, not shiny), adaxial sericeous (hair bases slightly enlarged)
B. reticulata
Source FNA vol. 21, p. 174. Author: Edward E. Schilling.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Helianthinae
Subordinate taxa
B. laciniata, B. parishii, B. reticulata
Name authority Kellogg: Proc. Calif. Acad. Sci. 2: 35. (1863)
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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