About typical Beta- leaves, I honestly have no idea. They almost look like a fused calyx sometimes. I can't really think of anything aside from personal preference but upon closer inspection, many Alpha-leaves aren't that different even if they are unfused at the base. You are not allowed to view links.
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Login to view. are pretty Beta-esque.
The pharma section actually has 4 strong fused Beta-leaves though they are too small to discern much.
Aside from pharma, all 'strict' Beta-style leaves are on pages by scribe 2 (f34r, f39r, f40r, f40v, f43, f46r, f55v) except one by scribe 3 which is f95r2. But scribe 5 also has one example with calyx-style leaves, f48r.
But all the leaf shapes can be found in Alpha-plants. The only thing on scribe 2 pages that stands out is that they are completely fused at the base.