Rorippa microtitis

(B. L. Robinson) Rollins

Rhodora 59: 71. 1957.

Basionym: Sisymbrium microtitis B. L. Robinson Bot. Gaz. 30: 59. 1900
Synonyms: Nasturtium microtitis (B. L. Robinson) O. E. Schulz
Treatment appears in FNA Volume 7. Treatment on page 501. Mentioned on page 496.

Annuals or, rarely, biennials; usually glabrous throughout, rarely sparsely pubescent proximally. Stems (simple or few from base), erect, branched distally, 1.5–6 dm. Basal leaves often not rosulate; blade margins pinnatifid. Cauline leaves petiolate; blade pinnatifid to pinnatisect or pectinate, (lobes 4–10 on each side, linear or oblong to ovate), 4–13 cm × 9–35 mm; base auriculate, margins entire or dentate, or (distally) pinnately lobed. Racemes (subumbellate), considerably elongated. Fruiting pedicels divaricate-ascending to horizontal, straight, 3–11 mm. Flowers: sepals ascending to spreading, oblong, 2–3 × 0.7–1 mm; petals (spreading), yellow, spatulate, 2.5–4 × 0.7–1.2mm; median filaments 1.8–3 mm; anthers oblong, 0.5–0.8 mm. Fruits siliques, usually curved inward, rarely straight, linear, (8–) 10–17 (–20) × 1–2 mm; ovules 42–68 per ovary; style 0.5–1 (–1.2) mm. Seeds biseriate, reddish-brown, cordiform, 0.6–0.9 mm (0.5–0.6 mm diam.), reticulate-foveolate.


Phenology: Flowering Jun–Aug.
Habitat: Wet pastures, moist fields, ponds, ditches, meadows
Elevation: 1700-2300 m

Distribution

V7 780-distribution-map.gif

Ariz., N.Mex., Mexico (Chihuahua)

Discussion

Selected References

None.

Lower Taxa

None.

"elongated" is not a number."thick" is not a number."dm" is not declared as a valid unit of measurement for this property.

... more about "Rorippa microtitis"
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
Ihsan A. Al-Shehbaz +
(B. L. Robinson) Rollins +
auriculate +
Sisymbrium microtitis +
appendaged +  and unappendaged +
4 cm40 mm <br />0.04 m <br /> (13 cm130 mm <br />0.13 m <br />) +
pinnatifid;pinnatisect or pectinate +
much smaller +  and reduced +
9mm;35mm +
urceolate +, campanulate +  and tubular +
branched +  and simple +
well-developed +
distinct +
not +  and undifferentiated +
not +  and differentiated +
emarginate +  and entire +
Ariz. +, N.Mex. +  and Mexico (Chihuahua) +
1700-2300 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
actinomorphic +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
spreading +  and erect +
0.7mm;1.2mm +
latiseptate +, stipitate +  and sessile +
terete +, torulose +, globose +, subglobose +, pyriform +, ellipsoid +, ovoid +, oblong +  and linear +
1.7 cm17 mm <br />0.017 m <br /> (2 cm20 mm <br />0.02 m <br />) +
straight +  and curved +
1 cm10 mm <br />0.01 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Wet pastures, moist fields, ponds, ditches, meadows +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
dentate or pinnately lobed +  and entire +
lobed;dentate +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
Purple (?) +, Lilac (?) +, Pink (?) +, Yellow (?) +  and White (?) +
rudimentary +
Flowering Jun–Aug. +
trinucleate +  and 3(-11)-colpate +
elongated +
divaricate-ascending +  and horizontal +
slender +
0.3 cm3 mm <br />0.003 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
not +  and mucilaginous +
not +  and mucilaginous +
reticulate-foveolate +
cordiform +
0.6mm +  and 0.9mm +
persistent +  and caducous +
distinct +
ascending +  and spreading +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
perforate +  and complete +
reduced +
latiseptate +, stipitate +  and sessile +
terete +, torulose +, globose +, subglobose +, pyriform +, ellipsoid +, ovoid +, oblong +  and linear +
latiseptate +, stipitate +  and sessile +
terete +, torulose +, globose +, subglobose +, pyriform +, ellipsoid +, ovoid +, oblong +  and linear +
tetradynamous +
procumbent +  and decumbent +
2-lobed +, entire +, conical +  and capitate +
subsessile +, sessile +  and petiolate +
0.1 cm1 mm <br />0.001 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
persistent +
distinct +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Nasturtium microtitis +
Rorippa microtitis +
species +
scale-like +  and forked +
pubescent +  and glabrous +
leathery +  and papery +
anastomosing +
biennial +  and annual +
glabrous +  and pubescent +
rhizomatous +, taprooted +, scapose +  and not +
perennial +, biennial +  and annual +
subshrub +  and herb +
aquatics +  and terrestrial +
glabrous +  and pubescent +