Cereus hildmannianus (Andes organ pipe)

Plate 1 figs. a–h · 8 separate observations

Cereus hildmannianus, photographed by Florencia Grattarola — fig. a Florencia Grattarola, CC BY 4.0 / 2022-05-15 / obs. 197930831

Cereus hildmannianus, photographed by Agustina Medina — fig. b Agustina Medina, CC BY 4.0 / obs. 180287817

Cereus hildmannianus, photographed by JG — fig. c JG, CC BY 4.0 / obs. 185810339

Cereus hildmannianus, photographed by Ezequiel Vera — fig. f Ezequiel Vera, CC BY 4.0 / obs. 115784918

Cereus hildmannianus, photographed by Hugo Hulsberg — fig. h Hugo Hulsberg, CC0 1.0 / obs. 157238716

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 7 botanical countries

Native distribution of Cereus hildmannianus, 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
Argentina Northeast	AGE	SOUTHERN AMERICA
Bolivia	BOL
Brazil South	BZS
Brazil Southeast	BZL
Brazil West-Central	BZC
Paraguay	PAR
Uruguay	URU

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 68 in flower of 132 examined

82%

52%

40%

18%

33%

54%

71%

59%

Proportion of examined Cereus hildmannianus in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	18	22	82%	61% to 93%
Feb	13	25	52%	34% to 70%
Mar	8	20	40%	22% to 61%
Apr	2	11	18%	5% to 48%
May	2	6	33%	10% to 70%
Jun	0	4	too few examined
Jul	0	0	too few examined
Aug	1	4	too few examined
Sep	2	3	too few examined
Oct	7	13	54%	29% to 77%
Nov	5	7	71%	36% to 92%
Dec	10	17	59%	36% to 78%

Peak flowering in Jan. Each bar is the share of Cereus hildmannianus 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. 68 of 132 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 4 months have fewer than 5 examined observations, so no proportion is drawn for them. 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 34 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.

Cactus abnormis Willd.
Cactus peruvianus var. monstruosus DC.
Cereus abnormis (Willd.) Sweet
Cereus alacriportanus Pfeiff.
Cereus alacriportanus var. bageanus (F.Ritter) P.J.Braun
Cereus bonariensis C.F.Först.
Cereus calvescens DC.
Cereus childsii Blanc
Cereus curvispinus Pfeiff.
Cereus haematuricus F.A.C.Weber ex K.Schum.
Cereus hildmannianus subsp. xanthocarpus (K.Schum.) P.J.Braun & Esteves
Cereus milesimus Rost
Cereus monstrosus Steud.
Cereus monstruosus K.Schum.
Cereus neonesioticus (F.Ritter) P.J.Braun
Cereus neonesioticus var. interior (F.Ritter) P.J.Braun
Cereus peruvianus subvar. nanus Salm-Dyck
Cereus peruvianus var. alacriportanus (Pfeiff.) K.Schum.
Cereus peruvianus var. monstrosus DC.
Cereus peruvianus var. ovicarpus Hertrich
Cereus peruvianus var. persicinus Werderm.
Cereus peruvianus var. proferrens Werderm.
Cereus peruvianus var. reclinatus Werderm.
Cereus uruguayanus R.Kiesling

and 10 more.

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.
Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. Retrieved 2026-07-13.
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.