討論:細葉水丁香

山羊百科，林文智老師的植物、山岳、攝影紀錄

• 《中国植物志》 第53(2)卷 (2000) >> 035页 PDF >> 草龙 Ludwigia hyssopifolia http://www.iplant.cn/info/Ludwigia%20hyssopifolia?t=z

1.Plant erect;rooting at stem base.

5. Stamens twice as many as sepals.

6. Stem and fruits conspicuously winged..........L. decurrens翼莖水丁香

6. Stem and fruits not winged.

7. Petals elliptic, apex acute.

8. Capsules oblanceolate-obconic, 4-angled; seeds all free........L. erecta美洲水丁香

8. Capsules subcylindric, nearly terete; seeds free in upper half of the capsule, embedded in chunks of endocarp in lower half of the capsule.........L. hyssopifolia細葉水丁香

7. Petals broadly obovateand emarginate..................L. octovalvis水丁香

5. Stamens as many as sepals.

9. Capsules oblanceolate; seeds0.3-0.5 mm long, all free...........L. perennis小花水丁香

9. Capsules linear or narrowly elliptic-lanceolate; seeds 0.7-1 mm long, all embedded in chunks of endocarp........L. epilobioides假柳葉菜