Braya humilis subsp. ellesmerensis

J. G. Harris

Novon 16: 345. 2006.

Treatment appears in FNA Volume 7. Treatment on page 550. Mentioned on page 549.

Stems usually ascending (prostrate in fruit), unbranched, 0.3–1.6 dm, moderately pubescent. Leaves: blade margins pinnatifid or entire, surfaces moderately pubescent. Flowers: petals white or purple-tinged, (3–) 4–5.6 × (1.3–) 2–3.3 (–3.8) mm. Fruits usually fertile and fully developed, not or weakly torulose, (1–) 1.2–1.8 (–2) mm wide; septum often fenestrate (with circular perforations at regular intervals longitudinally or with a narrow, elliptical, longitudinal split at base or both). 2n = 42.


Phenology: Flowering Jun–Jul, fruiting Jul–Aug.
Habitat: Sand, clay, and gravel slopes and plains
Elevation: 0-200 m

Discussion

Prostrate fruiting stems, exceptionally broad, non-torulose fruits, and fenestrate silique septae distinguish subsp. ellesmerensis from other subspecies of Braya humilis. It is known only from northern Ellesmere Island.

Selected References

None.

Lower Taxa

None.

"not" is not a number. "elongated" is not a number."thick" is not a number."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.

0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
obtuse +  and acute +
James G. Harris +
J. G. Harris +
cuneate +  and attenuate +
Sisymbrium humile +
appendaged +  and unappendaged +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
not auriculate +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
entire +  and pinnatifid +
sublinear;oblong;sublinear;oblong;oblanceolate;spatulate;obovate +
smaller +
0.1 cm1 mm <br />0.001 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
urceolate +, campanulate +  and tubular +
branched +  and simple +
well-developed +
not +  and distinct +
not +  and differentiated +
emarginate +  and entire +
incumbent +  and accumbent +
subsessile +  and sessile +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
ascending +  and erect +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Nunavut. +
0-200 m +
straight +  and curved +
not winged +  and unappendaged +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
connate +  and distinct +
not basally +  and dilated +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
actinomorphic +
latiseptate +  and sessile +
2.5 cm25 mm <br />0.025 m <br /> (3.2 cm32 mm <br />0.032 m <br />) +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
torulose +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
Sand, clay, and gravel slopes and plains +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
pinnatifid;sinuate-dentate;pinnatifid;sinuate-dentate +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.33 cm3.3 mm <br />0.0033 m <br /> (0.38 cm3.8 mm <br />0.0038 m <br />) +
purple-tinged +  and white +
4mm;5.6mm +
rudimentary +
spatulate +, oblanceolate +  and obovate +
0.2 cm2 mm <br />0.002 m <br /> (0.33 cm3.3 mm <br />0.0033 m <br />) +
Flowering Jun–Jul, fruiting Jul–Aug. +
trinucleate +  and 3(-11)-colpate +
ascending +  and erect +
slender +
mucilaginous +
uniseriate +  and biseriate +
not +  and mucilaginous +
white +, black +, brown +  and yellow +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
persistent +  and caducous +
distinct +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
reduced +
latiseptate +  and sessile +
terete +, torulose +, globose +, lanceoloid-subulate +, lanceoloid +, ovoid +, oval-elliptic +, cylindrical +, oblong +  and linear +
latiseptate +  and sessile +
terete +, torulose +, globose +, lanceoloid-subulate +, lanceoloid +, ovoid +, oval-elliptic +, cylindrical +, oblong +  and linear +
Illustrated +
tetradynamous +
procumbent +  and decumbent +
usually few +  and several +
2-lobed +  and entire +
subsessile +, sessile +  and petiolate +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
persistent +
distinct +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
Neotorularia humilis +  and Torularia humilis +
Braya humilis subsp. ellesmerensis +
Braya humilis +
subspecies +
subsessile +  and short-stalked +
coiled +, 1-7-veined +  and veined +
glabrescent +, , +  and pubescent +
anastomosing +
not +  and scapose +
glabrous +, pilose +  and pubescent +
perennial +, biennial +  and annual +
aquatics +  and terrestrial +
glabrescent +  and pubescent +