Rosaceae tribe Colurieae

Rydberg in N. L. Britton et al.

in N. L. Britton et al., N. Amer. Fl. 22: 240. 1908.

Treatment appears in FNA Volume 9. Treatment on page 57. Mentioned on page 21, 22, 58, 73.

Shrubs [trees], subshrubs, or herbs, perennial; unarmed. Leaves alternate, sometimes opposite (Geum), pinnately compound or simple; stipules persistent, ± free or ± adnate to petiole; venation pinnate or palmate. Flowers: perianth and androecium perigynous; epicalyx bractlets absent or present; hypanthium funnelform, saucer to cupshaped, or obconic to obcampanulate; torus usually enlarged; carpels (2 or) 3–250 (–450), styles terminal (subterminal in Waldsteinia), distinct; ovules 1 or 2, basal, superposed. Fruits aggregated achenes; styles persistent, sometimes deciduous (Waldsteinia), elongate, sometimes hooked, glabrous or hairy, rarely plumose.

Distribution

North America, Mexico, South America, Eurasia, Africa, Pacific Islands (New Zealand), Australia

Discussion

Genera 4, species ca. 60 (4 genera, 22 species in the flora).

Waldsteinia is recognized as distinct from Geum in this treatment, while D. Potter et al. (2007) included the former in the latter. Names are provided for users who would prefer to include Waldsteinia within Geum, as supported by molecular data (J. E. E. Smedmark and T. Eriksson 2002).

The base chromosome number for Colurieae is x = 7. Except for Fallugia, the genera of Colurieae are host to Phragmidium rusts. C. Kalkman (2004) stated that two ovules had been reported for Fallugia but that he observed only one, which would accord better with membership in Colurieae.

Selected References

None.

Key

1 Shrubs, 10–20(–35) dm; leaves simple; flowers all pistillate, all staminate, or staminate with terminal one bisexual. Fallugia
1 Herbs or subshrubs, 0.2–12 dm; leaves simple, sometimes lobed, or ternately or pinnately compound; flowers bisexual > 2
2 Subshrubs; inflorescences: flowers solitary. Sieversia
2 Herbs; inflorescences 1–18-flowered, open cymes or panicles > 3
3 Plants subscapose or leafy-stemmed; tori hemispheric to cylindric; carpels (2–)20–250(–450); fruiting styles persistent, elongating, hooked or not. Geum
3 Plants scapose; tori not evident; carpels 3–7; fruiting styles deciduous, not hooked. Waldsteinia

"thin" is not a number.

... more about "Rosaceae tribe Colurieae"
Luc Brouillet +
Rydberg in N. L. Britton et al. +
compound +  and simple +
opposite +  and alternate +
coriaceous +
free +  and distinct +
North America +, Mexico +, South America +, Eurasia +, Africa +, Pacific Islands (New Zealand) +  and Australia +
not +  and aggregated +
unisexual +  and bisexual +
not +  and aggregated +
obconic +  and obcampanulate +
crassinucellate +
simple +  and compound +
opposite +  and alternate +
deciduous +  and persistent +
toothed +, unlobed +  and lobed +
inferior +  and superior +
clustered +, biseriate +  and superposed +
2 +  and 1 +
0 (?) +  and 4 (?) +
free +  and distinct +
5 +  and 4 +
adnate +, free +, connate +  and distinct +
in N. L. Britton et al., N. Amer. Fl. +
not arillate +
free +  and distinct +
free +  and distinct +
branched +  and simple +
palmate +  and pinnate +
adnate +  and free +
deciduous +  and persistent +
distinct +
basal +, lateral +, subterminal +  and terminal +
hairy +  and glabrous +
plumose +, hooked +  and elongate +
Rosaceae tribe Colurieae +
Rosaceae subfam. Rosoideae +
inconspicuous +
enlarged +
herb +, subshrub +  and shrub +