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| April 2007 at Nikko Botanical Garden |
April 2007 at Nikko Botanical Garden |
April 2007 at Nikko Botanical Garden |
| Family | Rubiaceae |
| Scientific name | Houstonia caerulea L. |
| Synonyms | Hedyotis caerulea (L.) Hooker; Houstonia caerulea L. var. faxonorum Pease & A. H. Moore |
| Common name | (Japanese common name) hina-sou (ヒナソウ, 雛草 [meaning: tiny girls weed]) |
| (English common name) azure bluet, bluets, Quaker-ladies | |
| Distribution | (Japan) Honshu, Kyushu |
| (Other nations) [native] Canada, USA | |
| Habitat | Field, roadside |
| Chromosomal number | 2n=36 |
| Description | Plants electing 5-20cm tall. Leaves 3-12cm long (upper leaves 2-8 cm long). Flowers pale blue or white corollas 10-14mm across, flowering in March to June. Perennial plants. |
| Reference | Houstonia caerulea L. |
| Houstonia caerulea L. | |
| Houstonia caerulea L. | |
| Novel plants (WIPO Patent WO/2006/133970) | |
| Note | Naturalized plants (introduced as a garden plant in 1884-1885) |
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| April 2007 at Nikko Botanical Garden |
April 2007 at Nikko Botanical Garden |
April 2007 at Nikko Botanical Garden |
