Funastrum heterophyllum

Plate 1 figs. a–h · 8 separate observations

Funastrum heterophyllum, photographed by Rachel Whitt — fig. b Rachel Whitt, CC0 1.0 / obs. 200309536

Funastrum heterophyllum, photographed by Millie Basden — fig. e Millie Basden, CC BY 4.0 / obs. 192583311

Funastrum heterophyllum, photographed by Andrew Meeds — fig. f Andrew Meeds, CC BY 4.0 / obs. 192712042

Funastrum heterophyllum, photographed by Cricket Raspet — fig. h Cricket Raspet, CC BY 4.0 / obs. 188441108

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Native range 9 botanical countries

Native distribution of Funastrum heterophyllum, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows.

Region	TDWG code	Continent
Arizona	ARI	NORTHERN AMERICA
California	CAL
Mexico Northeast	MXE
Mexico Northwest	MXN
Mexico Southwest	MXS
Nevada	NEV
New Mexico	NWM
Texas	TEX
Utah	UTA

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Flowering 1,296 in flower of 1,615 examined

54%

64%

82%

91%

84%

89%

91%

83%

69%

71%

40%

Proportion of examined Funastrum heterophyllum in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	25	46	54%	40% to 68%
Feb	50	78	64%	53% to 74%
Mar	187	227	82%	77% to 87%
Apr	336	371	91%	87% to 93%
May	198	237	84%	78% to 88%
Jun	70	83	84%	75% to 91%
Jul	64	72	89%	80% to 94%
Aug	84	92	91%	84% to 96%
Sep	102	123	83%	75% to 89%
Oct	94	137	69%	60% to 76%
Nov	60	84	71%	61% to 80%
Dec	26	65	40%	29% to 52%

Peak flowering in Aug. Each bar is the share of Funastrum heterophyllum observations in which someone actually recorded the reproductive state and found the plant in flower, not the raw number of flowering records. That distinction matters: people observe plants far more in spring than in winter, so a bare count of flowering records partly measures when people go outside. Dividing by the number examined removes that. 1,296 of 1,615 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. This is still a global aggregate and not a forecast for your garden: the same species flowers on different dates in different hemispheres. Where a species has fewer than 30 flowering records we do not draw this chart at all. Computed from 10.15468/dl.cgje2x.

Also published as 15 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

Funastrum cynanchoides subsp. heterophyllum (Engelm. ex Torr.) Kartesz
Funastrum cynanchoides var. hartwegii (R.W.Holm) Krings
Funastrum hartwegii Schltr.
Funastrum lineare (A.Gray) J.F.Macbr.
Funastrum lineare var. heterophyllum (Engelm. ex Torr.) J.F.Macbr.
Philibertella hartwegii Vail
Philibertella hartwegii var. heterophylla (Engelm. ex Torr.) Vail
Philibertella heterophylla (Engelm. ex Torr.) Cockerell
Philibertia heterophylla (Engelm. ex Torr.) Jeps.
Philibertia linearis A.Gray
Philibertia linearis var. heterophylla (Engelm. ex Torr.) A.Gray
Philibertia linearis var. hirtella (A.Gray) A.Gray
Sarcostemma cynanchoides subsp. hartwegii R.W.Holm
Sarcostemma cynanchoides var. hartwegii (R.W.Holm) Shinners
Sarcostemma heterophyllum Engelm. ex Torr.

Sourcesevery claim on this page

World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite.