On Paul of Samosata, see Catholic Encyclopedia entry at web address 1; Paulicians at web address 2. The present material on him comes from George the Monk, Chronicon 470.10-20, with only slight differences.
[1] Mani or Manes: mu 147.
[2] Present-day Samsat, in eastern Turkey; Barrington Atlas map 67 grid H1. Also famous as the birthplace of Lucian (lambda 683).
[3] The reading fuai/ "growings" stems from the excerpta of George Cedrenus, where the mss of George the Monk read fwnai/ "voices". The latter is clearly a lectio facilior: for the metaphor of 'poisonous weed' for heretical thought cf. the use of the verb a)nafu/w by George the Monk, PG 110, col. 536 (in reference to Mani's heresy) and 538 (to Apollinarius); see also the chapter on Theodore of Mopsuestia (col. 538; cf. theta 154), whose thought is defined the 'second sprout' (deute/ra bla/sthsis) of the same wrong ideas about Christ's nature. The comparison of heresy with weed is common in ecclesiastical writers: see e.g. Ignatius, Letter to the Trallians 6-7 mo/nh| th=| *xristianh=| trofh=| xrh=|sqe, a)llotri/as de\ bota/nhs a)pe/xesqe, h(/tis e)sti\n ai(/rhsis "you shall nourish yourself only with the Christian food, and keep away from the extraneous weed, which is the heresy".
[4] A marginal addition in mss AM; cf. mu 147 (end). The relationship linking the Paulicians to Paul of Samosata is indeed doubted; it seems to have been an opinion held by the opponents of the sect (cf. web address 2).