Burm. Ind. Nic. Laurentii Burmmani Flora Indica. Lugd. Batav., 1768. 4.
Flora Indica p. 117 (1768)
Nicolaus Laurens Burman

ROSA (indica) germinibus ovatis, pedunculisque glabris, caule subinermi, petiolis aculeatis. Linn. sp. 705. ubi descr.
Rosa cheusan glabra, juniperi fructu. Petiv. gaz. 56. t. 35. f. 11. [1702]
Rosa versicolor javanica plena & chinensis. D. Pryon.
Foo-seu vulgo Ibara. Kaempf. amoen. 862. [1712] [Kaempfer listed four varietis: double red, double white, single red and single white.]
Habitat in Asia & China.
    Chinensis planta multo tenerior & minor est Javanica. Variant foliis ternis & quinis, petiolis ad basin foliolis inferioribus saepe decurrentibus cum impari pinnatis, superioribus ternis, Pedunculi in nostris speciminibus uniflori, floribus simplicibus & plenis intense purpureis, fructus magnitudine sorbi, at magis oblongi, calyce persistente nunc integerrimo nunc lacinato.

     The Chinese plant is much more tender and smaller than the Javanica. Variable leaves three together and five together, petioles often lower down to the base of the leaflets with an odd pinnate, the upper three, stems in our specimens uniflora, flowers single and double deep red, fruit size of Sorbus, but more elongated, calyx persistent, sometimes entire sometimes laciniate.
[I am not sure of the translation. Maybe the Chinese form is more tender, and the Javanese smaller.]

(Source: Flora Malesiana ser. 1, 5: Cyclopaedia of collectors, Supplement I)
Prayan or Prayon, Franciscus Albertus, Died: June 21, 1765, Batavia, Java.

career:
Is certainly identical with the mysterious collector Pryon (cf. Fl. Mal. 1, p. 418) on whom no data could be found. According to the ship’s muster-roll1, Prayan, a native of Cologne (Germany), sailed to the East Indies for the Chamber Amsterdam of the East India Company, on December 7, 1756. In 1759 he was third physician at Batavia.

collections:
Possibly labelled Pryon, and collected about 1759-64; they were sent to N.L. Burman.2
In Herb. Burman = Deless. (Geneva [G]).

literature:

(1) Amsterdam no 884 in the Alg. Rijksarchief, The Hague. As the names were written down from hearing, there is no conclusive proof that Prayan, and not Prayon, is the right name.
(2) In a MS concept letter to PRAYAN at Batavia, dated April 17, 1764, Burman thanks him for the seeds and plants sent from East India and asks for more material for his Flora Indica (S 48b, p. 3 in Un. Library Amsterdam).