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Key to families | Table of families and genera

Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.

 

FRASERA

Bruce G. Baldwin


Perennial herb (non-flowering rosettes preceding flower-stems, plants dying after flowering in Frasera albomarginata, Frasera parryi, Frasera puberulenta, Frasera speciosa, and Frasera umpquaensis; non-flowering rosettes appearing with flower-stems in others). Leaf: basal ± petioled; cauline opposite or whorled, < basal, base often fused-sheathing. Inflorescence: cyme or panicle of dense clusters. Flower: parts in 4s; calyx fused near base, lobes lanceolate; corolla rotate (bell-shaped), lobes >> tube, ridge between stamens fringed or scaled or 0, nectary pits prominent, 1(2) per lobe, margins of openings variously fringed; ovary sessile, style long and well differentiated or short and poorly differentiated, persistent, entire, stigmas 2.
± 15 species: temperate North America. (J. Fraser, Scottish collector of North America plants, 1750–1811) [von Hagen & Kadereit 2002 Syst Bot 27:548–572]
Unabridged references: [St. John 1941 Amer Midl Naturalist 21:1–29]

Key to Frasera

1. Nectary pits 2 per corolla lobe (appearing as 1 due to overlapping fringes or not) ..... F. speciosa

1' Nectary pit 1 per corolla lobe

2. Proximal to mid-stem leaves wide-elliptic, not white-margined; inflorescence dense, < 0.5 dm wide ..... F. umpquaensis

2' Proximal to mid-stem leaves narrower than wide-elliptic, white-margined (narrowly so or not); inflorescence dense or ± open, > 0.5 dm wide

3. Inflorescence ± open, generally > 1 dm wide or proximal-most branches < 1 dm from base and widely divergent, or both; distal pedicels generally within small cyme, not arising directly from main stem

4. Cauline leaves whorled, distal-most opposite or not ..... F. albomarginata

5. Inflorescence branches, calyx lobes glabrous; nectary pit 2-lobed at tip ..... var. albomarginata

5' Inflorescence branches, calyx lobes puberulent; nectary pit ± truncate or ± notched at tip ..... var. induta

4' Cauline leaves opposite

6. Stems, abaxial leaf faces glabrous; basal leaves 8–40 mm wide; nectary pit U-shaped ..... F. parryi

6' Stems, abaxial leaf faces puberulent; basal leaves 6–17 mm wide; nectary pit oblong-obovate ..... F. puberulenta

3' Inflorescence dense, interrupted or not, < 1 dm wide, proximal-most branches > 1 dm from base, strongly ascending; distal pedicels generally arising directly from main stem

7. Nectary pit margins with vertical, oblong, basally tubular, distally fringed extensions ..... F. tubulosa

7' Nectary pit margins fringed, without vertical extensions

8. Nectary pit round to ± square; ridge between stamens low, fringed ..... F. neglecta

8' Nectary pit oblong; ridge between stamens with ± 2 mm scales ..... F. albicaulis

9. Stems, abaxial leaf faces puberulent; larger leaves obtuse to rounded at tip ..... var. modocensis

9' Stems, leaves glabrous; larger leaves generally acute at tip ..... var. nitida

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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