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|A Vegan male|
Two Vegans were present at Starfleet Headquarters air tram station in San Francisco on stardate 7410.2. They were seen speaking to an Arcturian on the lower platform in the background when James T. Kirk and Sonak parted ways at the top of the stairs.
Background information Edit
While two interviews with Robert Fletcher described this species as Rhaandarites (citation needed • edit), the shooting script for The Motion Picture mentioned "high-domed Vegans" as an example of the aliens present in the Starfleet Headquarters scenes. Steven Lance's character was described as a Vegan in publicity material. 
In an interview with Robert Fletcher – published in the February 1980 edition of Fantastic Films, as part one of a two-part interview with him, called "The Star Trek Costumes" – the name of this species was consistently spelled "Rhaadarites" and they were described thus;
"From the star system Rhaandaran comes another race similar to Earthlings in their general appearance. They are a simple, gregarious people who carry the unisex look to its ultimate. Everyone dresses alike regardless of sex or age, both of which is difficult to ascertain without a scorecard. Rhaadarites are considered children until the age of 150 and don't even reach their full height – 8 or 9 feet – until they are at least 200 years old. Both female and male Rhaadarites are of equal physical strength and size and the only way to determine a lady Rhaadarite from her brother is by her jewelry. In the center of the female's forehead is a small black and silver disc which she wears at all times. The Rhaadarites are generally considered the country bumpkins of outer space and prefer not to leave their home world which accounts for the fact that only one 85-year-old Rhaadarite youngster is found in the Enterprise crew." 
In an interview appearing in the March 1980 edition of Fantastic Films, part two of "The Star Trek Costumes", Fletcher revealed more information about these aliens, who were now called "Rhaandarites", and the design of their costumes:
"These are the Rhaandarites. The lady is on the right; remember that the jewelry denotes the sex. This material is a black and silver lame, a very sensuous, clinging, sex material and these two guys are very big men. I thought it might be fun to dress them in this particular material. The necklace serves two purposes, first it is a lovely piece of jewelry, and second, it can be used for communication – an all-purpose jewelry with machinery built in. The necklace is made of a poured resin and a dark grey plastic. If you got very close to this piece you could look inside and see the tiny toy parts that were placed inside to simulate a working apparatus."
In an article appearing in the January 2002 edition of Star Trek: The Magazine Volume 2, Issue 9, entitled "Who is that Alien?", the following information about the Rhaandarites, as taken from Fletcher's original background notes, added:
"The Rhaandarites were a simple, gregarious people who were much better at taking orders than giving them. They were very long-lived and didn't really reach maturity until they were 150 or so. Unfortunately, the Rhaandarite on the Enterprise bridge was only supposed to be 85 years old."
According to backstage info, the name of the Rhaandarite homeworld was Rhaandaran. (citation needed • edit) According to Star Trek: Star Charts (United Federation of Planets I), Rhaandar (Alpha Indi) was a star in the Beta Quadrant. The primary was a class F star. The magnitude of this star was +3, which was ten times brighter than Sol. Rhaandar was the name of a planet in the system, too, and had, by 2378, become a member of the Federation.
In non-canon, the Rhaandarite species and the unnamed crewman from The Motion Picture were given a much fuller treatment in Christopher L. Bennett's novel Ex Machina. Further, the planet Rhaandar was mentioned offhand by Federation politicians in the Star Trek: Destiny novel "Lost Souls".