Festuca paradoxa |
Festuca roemeri |
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cluster fescue |
Oregon fescue, Roemer's fescue |
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Habit | Plants loosely cespitose, without rhizomes. | Plants densely cespitose, without rhizomes. |
Culms | 50-120 cm, glabrous. |
(35)50-90 (100) cm, erect, glabrous, smooth. |
Sheaths | closed for less than 1/3 their length, glabrous, shredding into fibers; Iigules (0.2)0.5-1.5 mm; blades 2-8 mm wide, flat or loosely convolute, smooth or scabrous, veins 9-35, ribs obscure; abaxial sclerenchyma in narrow strands; adaxial sclerenchyma developed; girders or pillars usually associated with the major veins. |
closed for less than 1/2 their length, glabrous, hirsute, or scabrous, persistent; collars glabrous; ligules 0.1-0.5 mm; blades 0.5-1(1.2) mm in diameter, conduplicate, abaxial surfaces glabrous or puberulent, adaxial surfaces sometimes scabrous, glabrous or pubescent, veins (5)7-9, ribs 5-9, well defined; abaxial sclerenchyma in 5-7 wide strands, sometimes confluent into a single band; adaxial sclerenchyma absent. |
Inflorescences | (5)10-20 cm, open, with 1-2 branches per node; branches lax, ascending to spreading, spikelets clustered towards the ends of the branches, closely imbricate. |
(7)8-20(25) cm, loosely to densely contracted, with 1-2 branches per node; branches erect to slightly spreading, lower branches with 2+ spikelets. |
Spikelets | 4-7(7.5) mm, elliptic to obovate, with 3-5(8) florets. |
9-13.5 mm, with 4-6 florets. |
Glumes | lanceolate to ovate-lanceolate, scabrous at least on the veins; lower glumes (2.5)3-4(5) mm, usually almost as long as the adjacent lemmas; upper glumes (3.5)4-5(5.5) mm; lemmas 4-5(5.2) mm, stiffly chartaceous, ovate to obovate, glabrous, somewhat acute, unawned; paleas as long as or slightly shorter than the lemmas, intercostal region smooth or scabrous distally; anthers (0.7)1-2(2.5) mm; ovary apices pubescent. |
exceeded by the upper florets, ovate-lanceolate, smooth or scabrous distally; lower glumes (2)2.5-5 mm; upper glumes 4-6.2 mm; lemmas 5-7(8.2) mm, scabrous near the apices, awns (2)3-5 mm, terminal, usually more than 1/2 as long as the lemma bodies; paleas about as long as the lemmas, intercostal region scabrous or puberulent distally; anthers (2.6)2.8-3.6(4) mm; ovary apices glabrous. |
2n | = unknown. |
= unknown. |
Festuca paradoxa |
Festuca roemeri |
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Distribution |
AL; AR; DE; GA; IA; IL; IN; KS; KY; LA; MD; MN; MO; MS; NC; NE; OK; PA; SC; TN; TX; VA; WI; ON; QC
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Discussion | Festuca paradoxa grows in prairies, open woods, thickets, and low open ground, from Wisconsin to Pennsylvania, south to northeastern Texas and northern Georgia. It resembles F. subverticillata (see previous), but its spikelets are more crowded on the branches. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Festuca roemeri grows in grasslands and open forests, primarily west of the Cascade Mountains, from southeastern Vancouver Island southward to northwestern California. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 24, p. 402. | FNA vol. 24, p. 440. |
Parent taxa | Poaceae > subfam. Pooideae > tribe Poeae > Festuca | Poaceae > subfam. Pooideae > tribe Poeae > Festuca > subg. Festuca > sect. Festuca |
Sibling taxa | ||
Synonyms | F. shortii | F. idahoensis var. roemeri |
Name authority | Desv. | (Pavlick) E.B. Alexeev |
Web links |
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