Tumamoca macdougalii

Rose

Contr. U.S. Natl. Herb. 16: 21, plate 17 [as macdouglai]. 1912.

Common names: Tumamoc globeberry
Illustrated
Treatment appears in FNA Volume 6. Treatment on page 30.

Stems: persistent woody portion 10–15 cm. Leaf-blades 3–4.5 cm, ultimate segments linear to linearlanceolate or narrowly ovate, 2–4 cm × 2–10 mm, surfaces hispidulous to pustulate-scabrous abaxially, glabrous adaxially. Inflorescences: staminate 2–19-flowered, 3.5–10 cm. Flowers: staminate: hypanthium 5–9 mm, petals 4–4.5 mm; pistillate: petals 5–6 mm. Fruits 0.8–1 cm diam. Seeds 7–8 mm.


Phenology: Flowering Jun–Oct.
Habitat: Semidesert grasslands, sandy washes and gullies, Atriplex flats, Sonoran desert scrub with Agave, Atriplex, Cercidium, Fouquieria, Jatropha, Lycium, Maytenus, Opuntia, Prosopis, and Stenocereus
Elevation: 700–1000 m

Discussion

In Tumamoca macdougalii, some plants produce all pistillate flowers, some all staminate flowers (dioecy), and some produce both pistillate and staminate (monoecy). Most plants apparently start the early summer as all staminate but only buds are produced, thus the staminate flowers quickly respond if rains come early. Pistillate flowers are not produced until the rains come in season, and then plants may be bisexual. The size of the tuber and the age of the plant may modify this schedule. Smaller plants may not produce pistillate flowers; larger plants may produce all pistillate flowers. (Biological information from Frank Reichenbacher, pers. comm.).

Selected References

None.

Lower Taxa

None.
... more about "Tumamoca macdougalii"
distinct +  and connate +
Guy L. Nesom +
3 cm30 mm <br />0.03 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
3-lobed;ovate;orbiculate +
tubular +, saucer--shaped +, campanulate +  and rotate +
Tumamoc globeberry +
Ariz. +  and Mexico (Sonora) +
700–1000 m +
furrowed +  and echinate +
dehiscent +  and indehiscent +
bristly +, smooth +, hairy +  and glabrous +
tuberculate +  and muricate +
fleshy +  and hard +
globose +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Semidesert grasslands, sandy washes and gullies, Atriplex flats, Sonoran desert scrub with Agave, Atriplex, Cercidium, Fouquieria, Jatropha, Lycium, Maytenus, Opuntia, Prosopis, and Stenocereus +
perennial +
dioecious +  and monoecious +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
2-19-flowered;staminate +
solitary +, corymbose +, fasciculate +, racemose +  and paniculate +
3.5 cm35 mm <br />0.035 m <br /> (10 cm100 mm <br />0.1 m <br />) +
petiolate +, estipulate +  and simple +
1-2-lobed +
fimbriate +
ellipsoid +
induplicate-valvate +  and imbricate +
distinct +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Flowering Jun–Oct. +
10 cm100 mm <br />0.1 m <br /> (15 cm150 mm <br />0.15 m <br />) +
Contr. U.S. Natl. Herb. +
compressed +, obovoid +  and ovoid +
deltate;triangular +
Illustrated +
annual +  and perennial +
climbing +  and procumbent +
sprawling +  and prostrate +
columnar +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
hispidulous +  and pustulate-scabrous abaxially +
tuberculate-rugose +
0.2 cm2 mm <br />0.002 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Tumamoca macdougalii +
Tumamoca +
species +
distinct +
plant +  and climbing +
dioecious +  and monoecious +