Montia
minerslettuce, montia, toad lily, water chickweed
prostrate to decumbent or erect, usually branched, often rooting at nodes.
cauline and sometimes basal;
basal leaves in rosettes;
cauline leaves 3 or more, alternate, opposite, or secund, distinct, not articulate at base, somewhat to markedly clasping, attachment points linear, petiolate or sessile;
blade linear, oblong, lanceolate or oblanceolate to rhombic, ovate, or suborbiculate.
axillary or terminal, racemose, somewhat to markedly secund (at least terminally), ebracteate or 1-bracteate at base of each flower.
radially symmetric (slightly irregular in M. fontana), not showy (except in M. parvifolia and M. bostockii), occasionally replaced by bulbils in M. chamissoi;
sepals persistent, unequal;
petals 5, sometimes absent, usually distinct (connate proximally in M. fontana);
stamens 3–5 (occasionally 2 in M. howellii);
ovary globose or linear-oblong, ovules 3;
style 1;
stigmas 3.
3-valved, longitudinally dehiscent from apex, valves not deciduous, margins involute.
1–3, black, rounded, tuberculate (appearing smooth in M. parvifolia);
elaiosome absent or, less than 1 mm.
= 7, 8, 10, 11.
Montia
Species 12 (8 in the flora).
The classification of Montia is in transition. It is widely recognized that the genus as traditionally treated is a rather disparate assemblage of species, albeit closely related. Several segregate genera have been described, but as R. C. Carolin (1993) has observed, “while some are almost certainly recognizable at the generic level, the others probably less certainly.” With the current legitimate uncertainty, it is appropriate to treat Montia here in the broad, traditional sense. To do otherwise is to give the impression that we know more about the relationships of the species than is actually the case.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Leaves opposite, never alternate or borne on flowering stems | → 2 |
1. Leaves alternate or secund, or borne on flowering stems | → 3 |
2. Plants annual or biennial, never bulbiferous; stems prostrate or decumbent; stamens 3 | M. fontana |
2. Plants perennial, usually bulbiferous; stems erect; stamens 5 | M. chamissoi |
3. Petals 6-15 mm, always present; plants rhizomatous or stoloniferous, often bulbiferous | → 4 |
3. Petals 0.7-6 mm, sometimes absent; plants not rhizomatous, stoloniferous, or bulbiferous | → 5 |
4. Plants not bulbiferous; leaves not in basal rosette; inflorescences 1-bracteate; Alaska, Yukon | M. bostockii |
4. Plants often bulbiferous; leaves in basal rosettes; inflorescences leafy; Pacific coast, cordillera of w North America | M. parvifolia |
5. Leaf blades 10-40 mm wide; clasping leaf sheaths absent; stamens 5 | M. diffusa |
5. Leaf blades 0.5-4 mm wide; clasping leaf sheaths present; stamens (2-)3-5 | → 6 |
6. Petals often absent; inflorescences axillary | M. howellii |
6. Petals present; inflorescences terminal | → 7 |
7. Flowers 2-8; seeds 1.2-2.6 mm; stems 2-30 cm | M. linearis |
7. Flowers 4-12; seeds 0.8-1.2 mm; stems 1-10 cm | M. dichotoma |
CA
OR
WA
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
