Insects
ant, white (termite) beetles golden beetle fly-sand
zarlit     needle/sting
fly gitch
leech lice rennels roach swamp spider Tur-pah
slime worm
Plants
Brak bush
dina flower
ferns
festal
flaminium
flower tree
grass; violet
Ka-la-na tree
Katch
leech plant
date palm tree
rence
rep bush
talender
Tem-wood
tes
tor
tospit bush
Tur
Veminium
         
ant, white (termite)-- white ants, or termites, of the vicinity, breaking apart their high, towering nests of  toughened clay, some of them thirty-five feet in height 13/293
Brak bush-- the leaves of which, when chewed, have a purgative effect  5/211
dina flower-- a small, lovely, multiply petaled flower, short-stemmed,  and blooming in a turf of green leaves, usually on the slopes of hills, in the northern temperate zones of Gor, in its budding, though in few other ways, it resembles a rose; it is an exotic, alien flower; it is also spoken of, in the north, where it grows most frequently, as the slave flower... 11/61
ferns-- ...amongst the ferns and flowers....4/190
festal-- type of shrubbery 24/339
flaminium-- scarlet, large-budded, five-petaled 8/154
flower tree-- segmented trunk...4/216 dangling loops of interwoven blossoms...curved branches..emerge in bouquets in subtle,delicate patterns of shades and hues...4/217
gitch-- "...not like the gitches whose bites are rather painful.  Some of them are big fellows, too. But there aren't many of them around.  The frevets see to it..." 21/277
golden beetle-- narcotic, filamented mane...curved, hollow, laterally moving jaw-pincers, drains the Priest-Kings of their body fluid, feeding itself, slaying them. 10/31
Ka-la-na tree-- yellow wine tree of Gor. 4/217
Katch-- foliated leaf vegetable 10/37
leech plant-- fastens two hollow thorns, like fangs into its victim. the chemical responses of the bladderlike pods produce a mechanical pumping action and the blood is sucked into the plant to nourish it. 2/33
date palm tree-- ...the palms 10/184 
needle or sting fly-- most originate in the delta, eggs laid on the stems of the rence plants, tend  to be attracted to the eyes as to moist bright objects...the sting is painful extremely so, but is not usually dangerous unless inflicted in great numbers...several stings can induce nausea, fatal only if stung numerous times...a painful swelling in the area of the sting is a common reaction...swelling subsides usually in a few Ahn. 24/161-162
sand fly-- Following such rains great clouds of sand flies appear, wakened from dormancy.  ...flying insects are found only in the vicinity of the oases...emerge after rains, infest kaiila...feast on kaiila and men...
roach-- We watched a large, oblong, flat-bodied black object, about a half hort in length, with long feelers, hurry toward a crack at the base of the wall. "That is a roach," he said.  "They are harmless...." 21/277
needle trees, evergreens-- used for masts, spars, cabin and deck planking 6/141
rence-- has a long thick root about four inches thick which lies horizontally under the surface of the water, small roots sink into the mud, as many as a dozen 'stems' extend upwards from the root often fifteen-sixteen feet from the root; has an excrescent, usually single floral spike; used in manufacturing rence paper; root: certain wooden tools and untensils are carved from it, a good fuel. stem--used to make reed boats, sails, mats, cords, a kind of fibrous cloth. pith--edible, one of the staples of the rence growers' diet, on occasion used as  caulking for boat seams, but tow and pitch covered by tar or grease are generally used  6/7
rennels-- poisonous, crablike desert insects  4/27
rep bush-- ... small, reddish, woody bush, commercially grown in several areas, but particularly below Ar and above the equator; the cheap rep-cloth is woven in mills, commonly, in various cities; it takes dyes well and, being cheap and strong,  is popular, particularly among the lower castes."  6/10 - 11 
slime worm-- a long, wormlike animal, eyeless, with a small red mouth  3/105
Swamp Spider-- has four pairs of eyes, sensory hairs on its appendages, monstrous insect.  mandible like curved knives.  do not hurt rational creatures  1/81-83  long black hairs cover the thorax 1/84  resides in swamp forest of Ar 1/89
talender-- a delicate yellow flower often associated in the Gorean mind with love and beauty 4/218 & 219 ...in the Gorean mind, is associated with beauty and passion. Free Companions on the Feast of their Free Companionship, commonly wear a garland of talenders.  Sometimes slave girls, having been subdued, but fearing to speak, will fix talenders in their hair. 6/217
Tem-wood-- linear, black, supple...4/217 used for rudders and oars 6/141
tes-- type of shrubbery 24/339
tor-- type of shrubbery...fairly translated to mean the bright shrub or the shrub of light...abundant bright flowers, either yellow or white depending on the variety...flowers in the fall.  24/339 ...does not grow higher than a man's waist 24/340
tospit bush-- wrinkled, yellowish-white peachlike fruit, about the size of a plum, grows on a  tospit bush, patches which are indigenous to the drier valleys of the western Cartius.  They are bitter but edible. 4/59
Tur-- large trunked reddish tree 4/217  used for galley frames, beams, clamps and posts and for hull planking 6/141
Tur-pah-- vinelike tree parasite with curled, scarlet ovate leaves....leaves are edible and used in sullage and other Gorean dishes. 4/217
Veminium-- a kind of bluish wild flower commonly found on the lower slopes of the Thentis range 5/163
vines-- ...for the vine, it rustled and lifted itself just beyond my reach.  4/210
violet grass-- grass...one of several hues used in Pleasure gardens  ...some dark blue and yellowish orange grass...4/219
zarlit fly-- very large, about two feet long, with four large, translucent wings with a span of about a yard, large pad-like feet, most are purple and harmless to humans...24/160  harmless, purple, about 2 feet long, four translucent wings spanning about a yard, pad-like feet  6/15
Note:  This information came from the Gor series of books written by John Norman.  The list is no where near complete as yet but will be added to as information comes available.