Table 2.
Morphological features of seed lots of seven cycad species
| Species name | Seed size (mm) (mean ± SD) (n = 30)* | Embryo length (mm) (mean ± SD) (n = 30)* | Seed with embryos (% ± SD) (n = 30)* | Embryo: Seed length ratio (n = 30)* | Reference | |
|---|---|---|---|---|---|---|
| Length | Width | |||||
| Cycas circinalis | 25–38 | 20–24 | – | – | – | Raju and Rao (2011) |
| Cycas revoluta | 36.4 ± 5.2 | 27.1 ± 2.1 | 12.1 ± 0.5 | 53.2 ± 0.2 | 0.33 | Dandugula (2011) |
| Cycas siamensis | 34.0 ± 4.1 | 23.7 ± 1.1 | 10.8 ± 1.0 | 82.3 ± 2.45 | 0.32 | Umair (2011) |
| Cycas taitungensis | 49.79 ± 2.55 (n = 20) | 32.32 ± 1.69 (n = 20) | 8.50 ± 0.45 (n = 5) | – | 0.17 | Chien et al. (2012) |
| Dioon edule (Lot 1) | 22.7 ± 6.4 | 18.6 ± 3.5 | 12.5 ± 1.1 | 67.1 ± 1.55 | 0.55 | Dandugula (2011) |
| Dioon edule (Lot 2) | 21.7 ± 1.4 | 19.1 ± 2.5 | 11.8 ± 3.4 | 6.6 ± 2.50 | 0.54 | Dandugula (2011) |
| Zamia furfuracea | 15.0 ± 4.6 | 10 ± 1.1 | 10.8 ± 1.0 | 82.3 ± 7.51 | 0.72 | Umair (2011) |
| Zamia floridana | 18.1 ± 6.2 | 11.5 ± 3.2 | 12.5 ± 1.1 | 67.1 ± 1.26 | 0.69 | Umair (2011) |
*n = 30, except where it is indicated in the bracket