Study of Common Fleabanes in Austin Metropolitan Area: Genus Erigeron

[1] Daisy Fleabane (E strigosis) vs [2] Philadelphia Fleabane (E philadelphicus) vs [3] Plains Fleabane (E modestus)

Taxonomy:
Erigeron
-Section Quercifolium
-E. strigosis
-Section Phalacroloma
-E. philadelphicus

-E. modestus

Lady Bird Wildflower Center Info:

Bloom time:

  1. April-May
  2. March-June
  3. February-October

Habitat:

  1. N/A
  2. Rich thickets, fields, and open woods
  3. Dry, open, calcareous uplands, Rocky uplands in West, Central and North Central Texas west to New Mexico and Arizona. Well-drained gravel, limestone.

Flora of North America Info:

Height:
1: 30-70cm
2: 4-80cm
3: 8-40cm

Stems:

  1. Erect or ascending
  2. Erect
  3. Ascending to spreading (often multiple from bases; of previous year often persistent)

Leaves, basal:


  1. a. Spatulate (tapered at base, wider at the end) to broadly or narrowly oblanceolate (lance-shaped, but the point at the base) to linear, 30-150mm
    b. Persistent through flowering (usually)

  2. a. Oblanceolate to obovate (Oval, wider at the end), 30–110mm
    b. Persistent or withering by flowering


  3. a. Spatulate to oblanceolate, 20–50mm
    b. Withering by late flowering

Leaves, cauline:

  1. a. Gradually reduced distally ( thinner further out from attachment area, like the leaf)
    b. Margins entire or shallowly to deeply serrate or crenate


  2. a. Oblong-oblanceolate to lanceolate, Gradually reduced distally. (bases clasping to auriculate-clasping (earlike clasping?))
    b. Margins shallowly crenate to coarsely serrate or pinnately lobed

  3. a. Same as basal, Spatulate to oblanceolate
    b. Margins entire or with 1–2(–3) pairs of teeth



From consulting the Manual of the Vascular Plants of Texas (1970), Shinners and Mahler's Illustrated Flora of North Central Texas (1999), Illustrated Flora of East Texas - East Texas Asteraceae Draft, Flora of North America

E. modestus
Stem leaves narrowly oblong or narrowly lanceolate or linear, gradually reduced
Perennial, enlarged taproot
18-40 cm
Greyish-pubescent
ligules white, often with a darker midstripe beneath, not coiling

E. strigosus
Stem leaves spatulate to narrowly oblanceolate (generally wider than E. strigosus), gradually reduced, sparse
Short-lived perennial (commonly biennial), fibrous roots
30-70 cm
ligules white. less commonly pinkish or blueish, coiling with age
Lower stems strigose, ascending hairs

E. tenuis
Stem leaves obovate, oblanceolate, spatulate

Check SEInet specimens

Publicado el viernes, 24 de septiembre de 2021 a las 09:41 PM por arnanthescout arnanthescout

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