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Bull. Torrey Bot. Club 25: 53. 1898
Common names: Flowery puncturebract
Etymology: Greek acantha, thorn, and scyphos, cup, alluding to awn on involucre
Synonyms: Oxytheca sect. Acanthoscyphus (Small) Ertter
Treatment appears in FNA Volume 5. Treatment on page 437. Mentioned on page 221, 439.
Herbs, annual; taproot slender. Stems arising directly from the root, erect to somewhat spreading, solid, not fistulose or disarticulating into ringlike segments, glabrous, partially glandular. Leaves usually persistent through anthesis, basal, rosulate; petiole indistinct; blade broadly obovate or spatulate to oblong or oblanceolate, margins ciliate-denticulate. Inflorescences terminal, cymose; branches dichotomous, not brittle or disarticulating into segments, round, glabrous except for glandular nodes and proximal 1/2 of internode; bracts 2–3, connate basally, scalelike, triangular to lanceolate or subulate, awned at proximal nodes, glabrous or sparsely glandular. Peduncles erect to deflexed. Involucres 1 per node, not ribbed, tubular, turbinate; teeth 4(–5) or 7–30(–36), 1/2 to completely connate, awn-tipped, glandular distally adaxially. Flowers 3–10(–20) per involucre at any single time during full anthesis; perianth white to rose, occasionally greenish white to cream, broadly campanulate when open, narrowly urceolate when closed, hirsute to strigose and sparsely glandular abaxially; tepals 6, connate 1/4–1/3 their length, monomorphic, entire or rarely irregularly divided apically; stamens 9; filaments basally adnate, glabrous or sparsely pubescent basally; anthers red to maroon, oblong to oval. Achenes usually included, dark brown to deep maroon, not winged, globose-lenticular, glabrous. Seeds: embryo curved. x = 20.
Acanthoscyphus is allied to Eriogonum subg. Ganysma, specifically to E. parishii, E. apiculatum, and their close relatives. It is distinguished from Eriogonum by its awned involucres.
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Facts about "Acanthoscyphus"
|Author||James L. Reveal +|
|Common name||Flowery puncturebract +|
|Distribution||S Calif. +|
|Etymology||Greek acantha, thorn, and scyphos, cup, alluding to awn on involucre +|
|Publication title||Bull. Torrey Bot. Club +|
|Publication year||1898 +|
|Source xml||https://firstname.lastname@example.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse grained fna xml/V5/V5 911.xml +|
|Synonyms||Oxytheca sect. Acanthoscyphus +|
|Taxon family||Polygonaceae +|
|Taxon name||Acanthoscyphus +|
|Taxon parent||Polygonaceae subfam. Eriogonoideae +|
|Taxon rank||genus +|
|Volume||Volume 5 +|