Plantago australis |
Plantago helleri |
|
---|---|---|
Mexican plantain |
Heller's plantain |
|
Habit | Perennials; caudex glabrous; roots fibrous, stout. | Annuals; roots taproots, slender. |
Stems | 0–10 mm. |
0–12 mm. |
Leaves | 40–350 × 6–77 mm; blade elliptic to narrowly elliptic, margins entire, veins conspicuous, surfaces pilose, rarely glabrate, adaxial surface hairs not floccose, less than 2 mm long, more than 0.03 mm wide. |
50–130 × 3–7 mm; blade linear, margins entire, veins conspicuous or not, surfaces villous, adaxial rarely glabrous. |
Scapes | 30–560 mm, hairy, hairs antrorse, short. |
80–250 mm, hairy, hairs patent, long and antrorse, short. |
Spikes | greenish or brownish, 100–1000 mm, densely flowered; bracts narrowly triangular, 1.6–4.2 mm, length 0.8–1.5 times sepals. |
greenish, whitish, or brownish, 50–120 mm, densely flowered, flowers in whorls or pairs; bracts triangular, 2.5–8 mm, length 0.6–2.2 times sepals. |
Flowers | sepals 2–2.5 mm; corolla radially symmetric, lobes erect, forming a beak, 2–2.8 mm, base obtuse; stamens 4. |
sepals 3.5–4 mm; corolla radially symmetric, lobes reflexed, 3–3.6 mm, base slightly cordate; stamens 4, connective elongated, apex acute. |
Seeds | 3, 1.2–2.2 mm. |
2, 3.2–3.8 mm. |
2n | = 24. |
= 20. |
Plantago australis |
Plantago helleri |
|
Phenology | Flowering summer. | Flowering spring. |
Habitat | Open places. | Dry slopes and flats on limestone. |
Elevation | 0–1000 m. (0–3300 ft.) | 100–1700 m. (300–5600 ft.) |
Distribution |
AZ; Mexico; Central America; South America
|
NM; TX
|
Discussion | Plantago australis occurs in Cochise, Coconino, and Pima counties. Plantago australis is most diverse in South America, where as many as 16 subspecies (K. Rahn 1974) may be recognized. Plants from California identified as P. hirtella are most likely P. subnuda. However, since the most important distinguishing character of P. australis is the absence of the developed taproot (which is fragile and often broken in herbarium specimens), all these samples require careful examination. Further research is needed also to clarify the circumscriptions of P. australis and P. subnuda. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Populations of Plantago helleri are concentrated in central Texas, especially in the Edwards Plateau and Trans-Pecos. The species also occurs in Eddy and Lincoln counties, New Mexico. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 17, p. 284. | FNA vol. 17, p. 287. |
Parent taxa | Plantaginaceae > Plantago | Plantaginaceae > Plantago |
Sibling taxa | ||
Synonyms | P. australis subsp. hirtella, P. hirtella, P. hirtella var. galeottiana, P. hirtella var. mollior | |
Name authority | Lamarck: in J. Lamarck and J. L. M. Poiret, Tabl. Encycl. 1: 339. (1792) | Small: Bull. New York Bot. Gard. 1: 288. (1899) |
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