Bensoniella

C. V. Morton

Leafl. W. Bot. 10: 181. 1965 ,.

Etymology: For Gilbert Thereon Benson, 1896–1928, Stanford University botanist
Treatment appears in FNA Volume 8. Treatment on page 83. Mentioned on page 43, 44, 47, 84.

Herbs, not rhizomatous, not stoloniferous; caudex slender, scaly. Flowering-stems erect or ascending, leafless, 19–45 cm, stipitate-glandular. Leaves in basal rosette; stipules present; petiole long-stipitate-glandular; blade orbiculate to cordate, 5–9-lobed, sinuses relatively shallow, base cordate, ultimate margins unevenly crenate, apex rounded, surfaces long-stipitate-glandular along veins abaxially, sparsely long-stipitate-glandular adaxially; venation palmate. Inflorescences spikelike racemes, from axillary buds of basal rosette, 15–30-flowered, ebracteate. Flowers slightly bilaterally symmetric, base gibbous on abaxial side; hypanthium 1/3 adnate to ovary proximally, free from ovary 0.5–0.8 mm, yellowish white to green; sepals 5, yellowish white to green; petals absent or 5, purple or pink; nectary tissue not seen or inconspicuous; stamens 5, opposite sepals; filaments filiform; ovary 1/3 inferior, 1-locular; placentation parietal; styles 2; stigmas 2. Capsules 2-beaked. Seeds dark-brown, oblong to ellipsoid, smooth. x = 7.

Distribution

w United States

Discussion

Bensonia Abrams & Bacigalupi, Contr. Dudley Herb. 1: 95, plate 5, fig. 1. 1929, not Buckman 1845 (fossil)

Species 1: w United States.

Although the floral morphology of Bensoniella is quite distinctive, vegetative similarities suggest a connection with the otherwise equally distinctive genus Mitella. Molecular data (D. E. Soltis et al. 1990), as well as karyotype analysis (Soltis 1988), clearly show a close relationship between the genera.

Species 1

Selected References

None.

... more about "Bensoniella"
epigynous +, perigynous +  and hypogynous +
Elizabeth Fortson Wells +  and Patrick E. Elvander† +
C. V. Morton +
gibbous +  and cordate +
dentate +, serrate +  and entire +
glandular-ciliate +  and ciliate +
5-9-lobed +, orbiculate +  and cordate +
3-carpellate +  and 2-carpellate +
slender +
ebracteate +, bracteate +  and 2-300(-1000+)-flowered +
w United States +
For Gilbert Thereon Benson, 1896–1928, Stanford University botanist +
unisexual +  and bisexual +
19 cm190 mm <br />0.19 m <br /> (45 cm450 mm <br />0.45 m <br />) +
2-3(-4)-beaked +  and folliclelike +
multicellular +
yellowish white +  and green +
free +  and adnate +
ebracteate +  and 15-30-flowered +
opposite +  and alternate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
crassinucellate +, unitegmic +  and bitegmic +
epigynous +, perigynous +  and hypogynous +
distinct +
Unlobed (?) +  and Lobed (?) +
peltate +  and jointed +
long-stipitate-glandular +
unequal +
Leafl. W. Bot. +
spikelike +
spiny +  and ribbed +
straight +
muricate +, cellular-rugulose +, tuberculate +, pitted +, papillate +  and wrinkled +
oblong +  and ellipsoid +
yellowish white +  and green +
distinct +
unbranched +  and branched +
persistent +
horizontal +  and erect +
connate +  and distinct +
long-stipitate-glandular +
Bensoniella +
Saxifragaceae +
not stoloniferous +  and not rhizomatous +
annual +, biennial +  and perennial +