FNA: Corispermum pacificum vs. Corispermum hyssopifolium

	Corispermum pacificum	Corispermum hyssopifolium
	common bugseed, Pacific bug-seed	bugseed, hyssop-leaf bugseed
Habit	Plants usually branched from base, (5–)15–40 cm, glabrous or sparsely covered with dendroid hairs (especially when young).	Plants branched from base (rarely slightly above base), 10–35(–55) cm, densely to sparsely covered with dendroid or stellate hairs, becoming glabrous.
Leaf	blades narrowly lanceolate, linear-lanceolate, or linear, flat or nearly so, 2–5(–7) × 0.2–0.6 cm.	blades linear-lanceolate or linear; usually plane,1.5–3.5(–4) × 0.2–0.4(–0.5) cm.
Bracts	ovate-lanceolate, narrowly ovate-lanceolate, almost ovate, or lanceolate, (1–)1.5–2.5 × 0.3–0.7(–0.9) cm.	ovate or ovate-lanceolate (rarely narrowly ovate-lanceolate to ± lanceolate), 0.5–1.5(–2) × 0.3–0.7 cm.
Inflorescences	usually compact, rather dense, or sometimes ± lax, condensed only near apex, ovoid, oblong-ovate, obovate, broadly linear, or occasionally clavate.	compact, usually not strongly condensed at apex, occasionally interrupted near base, linear, oblong-linear, or indistinctly clavate-linear.
Perianth	segment 1, sometimes absent in distal flowers.	segments 1(–3).
Fruits	usually black (rarely deep olive green, especially when immature), sharply contrasting with greenish semitransparent wings, without spots and warts, slightly convex abaxially, flat or slightly concave adaxially, orbiculate-obovate to almost orbiculate, broadest near middle (or occasionally slightly beyond), 3–4 × 2.7–3.8 mm, shiny; wing translucent, thin, (0.2–)0.3–0.6 mm wide, margins slightly undulate or indistinctly erose-denticulate, apex rounded or occasionally indistinctly notched.	brown, dark brown, or deep olive green, usually without spots and warts, broadly elliptic, prominently convex abaxially, usually plane or slightly concave adaxially, obovate-elliptic, or ± orbiculate, broadest near middle (rarely slightly beyond middle), 2.2–3.2 (–3.5) × 1.7–2.8 mm shiny wing (when present) translucent at margins, 0.1(–0.15) mm wide, margins entire, apex rounded.

	Corispermum pacificum	Corispermum hyssopifolium
Phenology	Flowering late summer–fall.	Flowering summer–early fall.
Habitat	Sandy shores, dunes	Sandy waste places, roadsides, shores
Elevation	0-500 m (0-1600 ft)	elevation not known
Distribution	ID; OR; WA [WildflowerSearch map] [BONAP county map]	CO; se Europe; w Asia [Introduced in North America] [BONAP county map]
Discussion	Of conservation concern. Corispermum pacificum seems to be closely related to Siberian C. crassifolium Turczaninov and C. maynense Ignatov. The latter species occurs in the northeastern Russian Far East and may be expected to occur in Alaska. Corispermum pacificum differs from C. maynense by its usually more robust habit, and its wing rounded (rarely rounded-truncate or indistinctly emarginate, but not triangular) at apex. From C. crassifolium it may be distinguished by the constant presence of perianth segments, and more flattened black mature fruits. Corispermum pacificum probably also occurs in adjacent regions of British Columbia. Corispermum pacificum is placed in subsect. Crassifolia (S. L. Mosyakin 1997). This subsection seems to be of Siberian origin, with its central species, C. crassifolium, being closest to the hypothetic ancestral taxon. The presence of perianth segments in C. pacificum may be explained by ancient hybridization with representatives of subsect. Pallasiana. Reproductive isolation between the sympatric species of Corispermum may be achieved by different flowering periods. Occasional hybrids between C. pacificum and C. villosum are similar in their habit to C. pacificum in having usually broad leaves and rather dense inflorescences but they have mostly aborted fruits suggesting that C. pacificum and C. villosum are taxonomically distant species. (Discussion copyrighted by Flora of North America; reprinted with permission.)	In addition to the key characteristics, Corispermum hyssopifolium is distinguished by having style bases short, barely exposed over the edge of wing and fruit surfaces which are glabrous and shiny. The application of the Linnaean name Corispermum hyssopifolium is problematic. The standing lectotype (C. E. Jarvis et al. 1993; I. C. Hedge 1997) and traditional circumscription of C. hyssopifolium (as understood by M. M. Iljin 1936; P. Aellen 1961, 1964; and many others) are accepted here. No unquestionable specimens of Corispermum hyssopifolium sensu stricto are known from North America. A collection from Colorado and some collections from Missouri approach this species most closely (S. L. Mosyakin 1995). However, their fruit morphology suggests that they are either members of the native Asian and North American group centered around C. pallasii, or resulted from hybridization between C. hyssopifolium and native representatives of subsect. Pallasiana. The name Corispermum hyssopifolium has been misapplied to the majority of species of the genus. (Discussion copyrighted by Flora of North America; reprinted with permission.)
Source	FNA vol. 4, p. 319.	FNA vol. 4.
Parent taxa	Chenopodiaceae > Corispermum	Chenopodiaceae > Corispermum
Sibling taxa	C. americanum, C. hookeri, C. hyssopifolium, C. navicula, C. nitidum, C. ochotense, C. pallasii, C. pallidum, C. villosum, C. welshii	C. americanum, C. hookeri, C. navicula, C. nitidum, C. ochotense, C. pacificum, C. pallasii, C. pallidum, C. villosum, C. welshii
Name authority	Mosyakin: Novon 5: 345, fig. 1A. (1995)	Linnaeus: Sp. Pl. 1: 4. (1753)
Web links	Local floras: BC, OR, WA Local Web sites: Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: CA Local Web sites: CalFlora, CalPhotos WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Corispermum hyssopifolium

common bugseed, Pacific bug-seed

bugseed, hyssop-leaf bugseed

Habit

Plants usually branched from base, (5–)15–40 cm, glabrous or sparsely covered with dendroid hairs (especially when young).

Plants branched from base (rarely slightly above base), 10–35(–55) cm, densely to sparsely covered with dendroid or stellate hairs, becoming glabrous.

Leaf

blades narrowly lanceolate, linear-lanceolate, or linear, flat or nearly so, 2–5(–7) × 0.2–0.6 cm.

blades linear-lanceolate or linear; usually plane,1.5–3.5(–4) × 0.2–0.4(–0.5) cm.

Bracts

ovate-lanceolate, narrowly ovate-lanceolate, almost ovate, or lanceolate, (1–)1.5–2.5 × 0.3–0.7(–0.9) cm.

ovate or ovate-lanceolate (rarely narrowly ovate-lanceolate to ± lanceolate), 0.5–1.5(–2) × 0.3–0.7 cm.

Inflorescences

usually compact, rather dense, or sometimes ± lax, condensed only near apex, ovoid, oblong-ovate, obovate, broadly linear, or occasionally clavate.

compact, usually not strongly condensed at apex, occasionally interrupted near base, linear, oblong-linear, or indistinctly clavate-linear.

Perianth

segment 1, sometimes absent in distal flowers.

segments 1(–3).

Fruits

usually black (rarely deep olive green, especially when immature), sharply contrasting with greenish semitransparent wings, without spots and warts, slightly convex abaxially, flat or slightly concave adaxially, orbiculate-obovate to almost orbiculate, broadest near middle (or occasionally slightly beyond), 3–4 × 2.7–3.8 mm, shiny;

wing translucent, thin, (0.2–)0.3–0.6 mm wide, margins slightly undulate or indistinctly erose-denticulate, apex rounded or occasionally indistinctly notched.

brown, dark brown, or deep olive green, usually without spots and warts, broadly elliptic, prominently convex abaxially, usually plane or slightly concave adaxially, obovate-elliptic, or ± orbiculate, broadest near middle (rarely slightly beyond middle), 2.2–3.2 (–3.5) × 1.7–2.8 mm shiny wing (when present) translucent at margins, 0.1(–0.15) mm wide, margins entire, apex rounded.

Corispermum pacificum

Corispermum hyssopifolium

Phenology

Flowering late summer–fall.

Flowering summer–early fall.

Habitat

Sandy shores, dunes

Sandy waste places, roadsides, shores

Elevation

0-500 m (0-1600 ft)

elevation not known

Distribution

ID; OR; WA

[WildflowerSearch map]

[BONAP county map]

CO; se Europe; w Asia [Introduced in North America]

[BONAP county map]

Discussion

Of conservation concern.

Corispermum pacificum seems to be closely related to Siberian C. crassifolium Turczaninov and C. maynense Ignatov. The latter species occurs in the northeastern Russian Far East and may be expected to occur in Alaska. Corispermum pacificum differs from C. maynense by its usually more robust habit, and its wing rounded (rarely rounded-truncate or indistinctly emarginate, but not triangular) at apex. From C. crassifolium it may be distinguished by the constant presence of perianth segments, and more flattened black mature fruits. Corispermum pacificum probably also occurs in adjacent regions of British Columbia. Corispermum pacificum is placed in subsect. Crassifolia (S. L. Mosyakin 1997). This subsection seems to be of Siberian origin, with its central species, C. crassifolium, being closest to the hypothetic ancestral taxon. The presence of perianth segments in C. pacificum may be explained by ancient hybridization with representatives of subsect. Pallasiana.

Reproductive isolation between the sympatric species of Corispermum may be achieved by different flowering periods. Occasional hybrids between C. pacificum and C. villosum are similar in their habit to C. pacificum in having usually broad leaves and rather dense inflorescences but they have mostly aborted fruits suggesting that C. pacificum and C. villosum are taxonomically distant species.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

In addition to the key characteristics, Corispermum hyssopifolium is distinguished by having style bases short, barely exposed over the edge of wing and fruit surfaces which are glabrous and shiny.

The application of the Linnaean name Corispermum hyssopifolium is problematic. The standing lectotype (C. E. Jarvis et al. 1993; I. C. Hedge 1997) and traditional circumscription of C. hyssopifolium (as understood by M. M. Iljin 1936; P. Aellen 1961, 1964; and many others) are accepted here.

No unquestionable specimens of Corispermum hyssopifolium sensu stricto are known from North America. A collection from Colorado and some collections from Missouri approach this species most closely (S. L. Mosyakin 1995). However, their fruit morphology suggests that they are either members of the native Asian and North American group centered around C. pallasii, or resulted from hybridization between C. hyssopifolium and native representatives of subsect. Pallasiana.

The name Corispermum hyssopifolium has been misapplied to the majority of species of the genus.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source

FNA vol. 4, p. 319.

FNA vol. 4.

Parent taxa

Chenopodiaceae > Corispermum

Sibling taxa

C. americanum, C. hookeri, C. hyssopifolium, C. navicula, C. nitidum, C. ochotense, C. pallasii, C. pallidum, C. villosum, C. welshii

C. americanum, C. hookeri, C. navicula, C. nitidum, C. ochotense, C. pacificum, C. pallasii, C. pallidum, C. villosum, C. welshii

Name authority

Mosyakin: Novon 5: 345, fig. 1A. (1995)

Linnaeus: Sp. Pl. 1: 4. (1753)

Web links

Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).

Choose a data source: Flora of North America, OregonFlora, UW Burke Herbarium

The species comparison tool is brought to you by:

Flora of North America species comparison

Corispermum pacificum

Corispermum hyssopifolium

Corispermum pacificum

Corispermum hyssopifolium