|University of California, Berkeley|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Index to accepted names and synonyms:
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|Family: Plantaginaceae||View Description||Dichotomous Key|
|Genus: Penstemon||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Penstemon filiformis (D.D. Keck) D.D. Keck
Habit: Perennial herb 20--50 cm, woody-branched proximally, finely downward-pointing-hairy. Leaf: thread-like, sometimes glabrous; short basal leaves densely clustered; cauline leaves 20--70 mm, generally +- 0.5 mm wide, tightly inrolled, entire. Inflorescence: glandular-hairy. Flower: calyx 3.4--5.7 mm, lobes lanceolate; corolla 13--16 mm, blue, glandular outside, floor glabrous; anther sacs 1.2--1.4 mm, dehiscing at proximal end to 1/2 their length, inner margins short-hairy; staminode glabrous. Chromosomes: 2n=16.
Ecology: Open, rocky places among shrubs, yellow-pine forest; Elevation: 400--1700 m. Bioregional Distribution: KR (n Trinity, nw Shasta cos.). Flowering Time: May--Jul
eFlora Treatment Author: Margriet Wetherwax & Noel H. Holmgren
Jepson Online Interchange
Listed on CNPS Rare Plant Inventory
Previous taxon: Penstemon eatonii var. undosus
Next taxon: Penstemon floridus
Citation for this treatment: Margriet Wetherwax & Noel H. Holmgren 2016. Penstemon filiformis, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=36938, accessed on July 30, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on July 30, 2016.