Johanneshowellia
Howell's-buckwheat
arising directly from the root, weakly erect to spreading, solid, not fistulose or disarticulating into ringlike segments, silky-puberulent.
usually quickly deciduous, basal, rosulate;
petiole present;
blade obovate to rounded or somewhat reniform, margins entire.
terminal, cymose;
branches dichotomous or trichotomous at proximal node, otherwise dichotomous, not brittle or disarticulating into segments, round, silky-puberulent;
bracts 3, connate proximally, triangular or linear to narrowly lanceolate, scalelike or somewhat leaflike, not awned, glabrous to puberulent.
absent.
4–7 per involucral cluster;
perianth white or pale yellowish to rose or red, broadly campanulate when open, narrowly urceolate when closed, smooth or minutely pustulose abaxially, glabrous;
tepals 6, connate 1/4 their length, monomorphic or slightly dimorphic, entire apically;
stamens 9;
filaments basally adnate, glabrous;
anthers white to pale pink, oblong.
included, light brown, not winged, 3-gonous, glabrous.
embryo curved.
bracts obscure, in tight spiral of (3–)4(–7) distinct, oblanceolate to obovate lobes, bractlike, not awned.
Johanneshowellia
Species 2 (2 in the flora).
With recognition of Johanneshowellia, all members of Eriogonum have their involucral bracts fused into a distinct, turbinate to campanulate or hemispheric, tubular structure. In Johanneshowellia, the four to seven, distinct, involucral bracts are arranged in a tight spiral. Each 0.5–1.2 mm, awnless, entire to deeply lobed bract subtends a flower-bearing pedicel. These involucral bracts are themselves usually obscured by inflorescence bracts that subtend each node. As a result, care must be taken to observe the true nature of the involucral complex. The genus is allied with Eriogonum subg. Oregonium.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Perianths minutely pustulose basally and along midribs, 1.5-2 mm in fruit; outer tepals narrowly ovate, slightly auriculate basally with slightly undulate-crisped margins in fruit; plants grayish to greenish, mostly densely silky-puberulent | J. puberula |
1. Perianths smooth, 2-2.5 mm in fruit; tepals lanceolate, not auriculate basally, margins entire; plants reddish, thinly silky-puberulent | J. crateriorum |
CA
WildflowerSearch
iNaturalist
USDA Plants Database
