|
Main differences between Q. xylina,
Q. obtusata, Q. praeco and Q. deserticola
|
||||
|
|
Q. xylina
|
Q. obtusata
|
Q. praeco |
Q. deserticola
|
| Blade |
coriaceous 6-8 cm long, 3-5 cm wide |
subcoriaceous 6-16 cm long, 4-8 cm wide |
subcoriaceous 4-10 cm long, 2-6 cm wide |
coriaceous 4-9 cm long, 1.5-3 cm wide |
| Leaf adaxially | glabrous, or with some glandu-
lar and stellate trichomes |
various trichomes along midrib, then glabrescent | often some stellate and fasciculate trichomes | some sparce, multiradiate trichomes along midrib |
| Leaf abaxially | dense, persistent, glandular and fasciculate trichomes | rare fasciculate and glandular trichomes along midrib | same trichomes as adaxially but very dense | dense stellate trichomes and some glandular ones |
| Veins | 7-12 pairs, impressed above, raised underneath | 7-12 pairs, slightly impressed above | 7-12 pairs, flat above or remotely impressed | 6-9 pairs, impressed above, raised beneath |
| Petiole | 0.7-1.3 cm long | 0.5-1.2 cm long | 0.3-1 cm long | 0.2-0.6 cm long |
| Acorn | 1.5-2 cm long, oblong | 1-2 cm, mostly globose | 1.7-2 cm long, ovoid | 1.5 cm long, ovoid |
| Cupule | straight margin | straight margin | margin strongly rolled inside | straight margin |