Chorizanthe biloba

Goodman

Ann. Missouri Bot. Gard. 21: 73. 1934.

Endemic
Synonyms: Chorizanthe palmeri var. biloba (Goodman) Munz
Treatment appears in FNA Volume 5. Treatment on page 458. Mentioned on page 448.

Plants erect or infrequently spreading, (0.5–) 1–3 (–4) × 1–3 (–4) dm, pubescent. Leaves basal; petiole 0.5–3 cm; blade oblanceolate, 1–3 (–5) × 0.4–1 (–1.3) cm, thinly pubescent. Inflorescences with involucres in open clusters 2–4 (–6) cm diam., greenish or reddish to purplish; bracts 2–3 at proximal node, usually leaflike, often with whorl of sessile bracts ca. midstem, elliptic, 0.5–1.5 cm × 2–6 mm, gradually becoming lanceolate to elliptic, 0.2–2 cm × 1.5–8 mm, at distal nodes scalelike, linear and aciculate, acerose, awns straight, 1–3 mm. Involucres 3–10 or more, grayish or reddish, urceolate and slightly ventricose basally, 4–6 mm, without scarious or membranous margins, slightly corrugate, strigose; teeth erect to spreading, unequal, 1–2 mm; awns mostly uncinate, 0.5–2 mm, with longer anterior one straight, mostly 2 mm. Flowers exserted; perianth bicolored with floral-tube white to yellow and tepals red, maroon, or dark purple, cylindric, (4.5–) 5–6 mm, sparsely pubescent; tepals connate 1/2 their length, dimorphic, obovate, those of outer whorl spreading, slightly longer than those of inner whorl, 2-lobed, emarginate, or subacute apically, those of inner whorl erect, obtuse, fimbriate apically; stamens 9, exserted; filaments distinct, 4–5 mm, glabrous; anthers yellow to golden, oblong, 1.2–1.8 mm. Achenes brown, globose-lenticular, 4–4.5 mm. 2n = (34, 36, 38), 40, (42, 44, 46).

Discussion

Varieties 2 (2 in the flora).

Unlike the serpentine species Chorizanthe palmeri and C. ventricosa, C. biloba occurs on gravelly or clayey soils. Those species and C. obovata can be quickly differentiated by carefully examining the colors, shapes, and modifications of the tepals. Immature specimens can be difficult to place, but a combination of geographic location and edaphic features can often enable accurate identification of even fragmentary material.

Selected References

None.

Key

1 Outer tepals deeply 2-lobed, occasionally erose apically Chorizanthe biloba var. biloba
1 Outer tepals emarginate or subcordate apically Chorizanthe biloba var. immemora

"/2" is not declared as a valid unit of measurement for this property."dm" is not declared as a valid unit of measurement for this property."dm" is not declared as a valid unit of measurement for this property."/2" is not declared as a valid unit of measurement for this property.

... more about "Chorizanthe biloba"
46] +, 44 +, [42 +, 40 +, 38] +, 36 +  and [34 +
globose-lenticular +
yellow +  and golden +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
James L. Reveal +
Goodman +
alternating +
straight +
uncinate +
unequal +
2 cm20 mm <br />0.02 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
alternate +  and rosulate +
stipelike +
awn-tipped +  and simple +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
oblanceolate +
0.4cm;1cm +
deciduous +
distinct +
0.2 cm2 mm <br />0.002 m <br /> (2 cm20 mm <br />0.02 m <br />) +
glandular +, woolly-floccose +, tomentose +, strigose +, villous +, hirsute +  and pubescent +
acerose +, lanceolate +  and elliptic +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
disarticulating +, dichotomous +, branched +  and open +
erect +  and spreading +
just below the soil surface or and above the soil surface +  and spreading +
curved +  and straight +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
white +  and yellow +
white +  and pink or rose maroon or purple or yellow +
decumbent to erect +  and prostrate +
unwinged +  and winged +
black +, red +, brown +  and yellowish +
exserted +  and included +
pubescent +  and glabrous +
spheroidal +, 4-gonous +, lenticular +, biconvex +, discoid +, 3-gonous +  and 2-gonous +
uniparous +, capitate +  and cymose +
cymelike +, paniclelike +, racemelike +  and spikelike +
connate +  and free +
reddish +  and grayish +
ventricose +  and urceolate +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
nonmembranous +
in whorls +, opposite +, alternate +  and rosulate +
deciduous +  and persistent +
bractlike +
pubescent +  and glabrous +
lobed +, undulate +, crisped +, crenulate +  and entire +
not swollen +
orthotropous +
accrescent +
curved +  and straight +
erect to deflexed +
cylindric +  and campanulate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
0.5 cm5 mm <br />0.005 m <br /> (3 cm30 mm <br />0.03 m <br />) +
homostylous +  and 3-carpellate +
Ann. Missouri Bot. Gard. +
, +  and solid +
slender;stout +
not disarticulating +
decumbent to erect +  and prostrate +
prostrate +  and erect +
penicillate +, fimbriate +  and capitate +
deciduous +  and persistent +
? (?) +  and ? (?) +
coriaceous +  and membranous +
consisting of a series +  and tubular +
distinct +
erect;spreading +
Chorizanthe palmeri var. biloba +
chambered +, , +  and solid +
Slender (?) +  and Stout (?) +
Chorizanthe biloba +
Chorizanthe sect. Ptelosepala +
species +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
dark purple +, maroon +  and red +
cylindric +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
coriaceous +
shallow +
erect +  and spreading +
unequal +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
3 +, 2 +  and 1 +
erect +  and spreading +