When does Snapdragon Vine bloom in Texas?

Most often in September. Across 598 dated, research-grade observations of Maurandella antirrhiniflora in Texas, the flowering season runs roughly March to December.

Peak September In flower 598 Examined 648 State Texas

Flowering 598 in flower of 648 examined

56%

78%

82%

94%

92%

95%

97%

87%

98%

96%

98%

89%

Proportion of examined Maurandella antirrhiniflora in Texas in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	5	9	56%	27% to 81%
Feb	7	9	78%	45% to 94%
Mar	56	68	82%	72% to 90%
Apr	118	126	94%	88% to 97%
May	79	86	92%	84% to 96%
Jun	70	74	95%	87% to 98%
Jul	66	68	97%	90% to 99%
Aug	33	38	87%	73% to 94%
Sep	58	59	98%	91% to 100%
Oct	51	53	96%	87% to 99%
Nov	39	40	98%	87% to 100%
Dec	16	18	89%	67% to 97%

Peak flowering in Sep. Each bar is the share of Maurandella antirrhiniflora in Texas 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. 598 of 648 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.wt38fd.

What this is, and what it is not

This is a record of when people in Texas found Maurandella antirrhiniflora in flower, not a forecast. It is computed only from observations made in Texas, 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

Maurandella antirrhiniflora

Snapdragon Vine

Sourcesevery claim on this page

GBIF (iNaturalist Research-grade Observations). Dated flowering annotations in Texas. 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.