| 单词 | Viola canina |
| 例句 | Plants belonging to this class commonly bear both kinds of flowers every season, and the perfect flowers of Viola canina yield fine capsules, but only when visited by bees. Effects of Cross and Self Fertilisation in the Vegetable Kingdom I have just looked again at Viola canina. More Letters of Charles Darwin — Volume 2 Viola canina is sterile, when not visited by insects, but when so visited forms plenty of seed. Life and Letters of Charles Darwin — Volume 2 Viola canina. — tricolor. measurements. superiority of crossed plants. period of flowering. effects of cross-fertilisation. seeds. partially sterile. corolla removed. Effects of Cross and Self Fertilisation in the Vegetable Kingdom |
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