Interesting Engineering on MSN9 个月
Seed ferns tested leaf vein networks 201 million years ago, here’s how
The leaves of this species 201 million years ago had their net-like veins ... explained the fossil leaf Furcula granulifer ...
JSTOR Daily7 年
Venation and Senescence of Polyembryonic Citrus Plants
8 (Oct., 1919), pp. 311-329 (19 pages) 1. Germination tests showed that 43.18 percent of the seeds of Citrus grandis produce polyembryonic shoots. 2. A new method for clearing and staining leaves is ...