When does pineland chaffhead bloom in Florida?

Most often in September. Across 258 dated, research-grade observations of Litrisa carnosa in Florida, the flowering season runs roughly June to October.

Peak September In flower 258 Examined 315 State Florida

Flowering 258 in flower of 315 examined

43%

80%

94%

97%

98%

92%

55%

Proportion of examined Litrisa carnosa in Florida in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	0	2	too few examined
Feb	0	10	0%	0% to 28%
Mar	0	14	0%	0% to 22%
Apr	0	3	too few examined
May	3	7	43%	16% to 75%
Jun	16	20	80%	58% to 92%
Jul	51	54	94%	85% to 98%
Aug	57	59	97%	88% to 99%
Sep	90	92	98%	92% to 99%
Oct	35	38	92%	79% to 97%
Nov	6	11	55%	28% to 79%
Dec	0	5	0%	0% to 43%

Peak flowering in Sep. Each bar is the share of Litrisa carnosa in Florida 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. 258 of 315 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 2 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.wt38fd.

What this is, and what it is not

This is a record of when people in Florida found Litrisa carnosa in flower, not a forecast. It is computed only from observations made in Florida, so it is not the species’ global average dragged onto a map: the same plant flowers on different dates in different places, and that is the entire point of the page.

It will not tell you what your particular plant will do this year. Bloom time moves with the season, with altitude, and with the weather, and a warm February pulls everything forward. We publish the distribution and the sample size, and we refuse to draw a month that too few people examined.

The plant

Litrisa carnosa

pineland chaffhead

Sourcesevery claim on this page

GBIF (iNaturalist Research-grade Observations). Dated flowering annotations in Florida. Every record achieved iNaturalist quality grade Research, which is applied upstream at export. 10.15468/dl.wt38fd. Retrieved 2026-07-14.
World Flora Online Plant List. The accepted name. CC0. Retrieved 2026-07-12.