Vajra Posture vs Lotus Posture -- the same or male vs female? I always thought that "Vajra Posture" and "Lotus Posture" were simply two names for the same thing. But recently somebody told me that Vajra Posture is for males and Lotus Posture for females, though without explaining any physical difference.

Searching turns up mostly interchangeable usage, and a few instances that confirm the male/female difference, though without explanation -- for example https://goo.gl/fxIi2Y and https://goo.gl/U0KKb1

Anybody know the story? Is there a male vs female difference? If so, is it the same physical posture, differing only in the gender of the practitioner, or is there an actual physical difference? Does it vary by tradition? (I suspect the difference is mainly found in the Tibetan / Vajrayana tradition, where the vajra symbolizes a male genital organ and the lotus a female organ.)



Addendum 8/30/2015. I wonder if what's called "half lotus position" in yoga is lotus position in Buddhism. In other words, in Buddhism vajra position is both feet up on opposite thighs, lotus position is just one foot up with the other on the mat. Evidence for this comes from this web site -- http://www.himalayanart.org/pages/glossary.cfm -- which is associated with the Rubin Museum (http://rubinmuseum.org/) -- this entry:


  Asana (Skt.): seated or standing postures of which there are a variety
  of prescribed forms arising from iconographic descriptions found in
  religious texts. The names of the postures differ between religious
  traditions. For example the lotus posture in Hatha Yoga is called
  vajra posture in Buddhism. The half yoga posture in Hatha Yoga is
  called the lotus posture in Buddhism.


A problem here is that the term "half yoga posture" is not a standard yoga term (according to a web search). But perhaps they meant "half lotus". 

Here, by the way, is a site showing both, using the names from yoga: lotus and half-lotus -- http://www.wildmind.org/posture/lotus. 




If my conjecture is correct, these are what's known in Buddhsim as vajra and lotus position respectively. Even if this is correct, however, it does not address the gender connection. Maybe that is just a Vajrayana (Tantric) convention -- male figures use the vajra position and female figures the lotus position. But even if so, I'm sure there is a story behind it.
There is both no gender difference in the Lotus Posture and Vajra Posture or any other difference whatsoever as far as I'm aware. These are interchangeable terms for the same posture - the former has its root in Hatha Yoga and latter in Tibetan Vajrayana. There is, however, a gender difference in the Sattva Posture which is often recommended in Tibetan traditions if full lotus is not possible. This is maybe where the misunderstanding may have started? In the  'The Tibetan Yoga of Breath: Breathing Practices for Healing the Body and Cultivating Wisdom':


  Sattva posture is done differently for males and females, but both can begin by sitting cross-legged on the floor. Elevating the hips so that they rest above the knees makes the posture easier to hold, so we need to sit on a pillow or cushion. For males, the left leg is tucked in closer to the body and the left foot placed on the inner right thigh, while the right leg rests in the front. For females it is the opposite: the left leg rests in the front and the right leg is tucked, with the right foot resting on the inner left thigh. This posture is similar to a half lotus posture, except that one leg rests in front of the body for balance.