great comment, genuinly made me smile - never thought of that 
alright, before this one gets into the woods, so to speak. Lexical info for the word dendron which i presume colewd was referring to as “mustard tree” (not getting back into the conversation - figured this would be relatively interesting if nothing else
LSJ
δένδρεον, δένδρον, and δένδρος, τό (late δένδρος, ὁ, Ath.Med.ap.Orib.inc.7.4), δένδρεον always in Ep. (δενδρέῳ, δενδρέων, disyll., Il. 3.152, Od.19.520), also Ion., Hdt.4.22, and Dor., IG4.951.90 (Epid., iii B.C.); Aeol. δένδριον Theoc.29.12; later Ep. δένδρειον, τό, Arat. 1008, Nic.Th.832: δένδρος, τό, nom., IG14.1934 i 3; acc., Hdt.6.79; gen. δένδοεος IG1.951.91, δένδρους Meno Iatr.32.53; dat. δένδρει, Ion. -εϊ Hp.Nat.Puer.26, Meno Iatr.33.4, Arr.Ind.7.11: nom. pl. δένδρη E.Fr.484.5, Pherecr.130.9, IG4.951.121, PHal.1.99 (iii B.C.), Ant.Lib.31.5; dat. pl δένδρεσι Hdt.2.138, Hp.Nat.Puer.26 (and so usu. in Att. Prose, as Th.2.75, Pl.Lg.625b, cf. Moer.131, and later, as BCH12.27 (Mylasa), Str.2.1.14), late δενδράσι v.l. in J.BJ6.1.1: indeterminate forms. nom. pl. δένδρεα Hecat.202(a)J., Hdt.1.17, al., E.Ba.563 (lyr.); gen. δενδρέων Hdt.1.202, al., Tab.Heracl.1.129, al.: δένδρον, τό, first in Hdt.1.193, 3.107, regul. in Att., Lys.7.28, etc., and later Gr. (exc. in dat. pl., v. supr.), cf. Ael.Dion.Fr.119:—tree: δένδρον ἐλάας an olive-tree, Ar.Av.617; δ. ἄρκτου, = ἀκτῆ, Ps.-Dsc.4.173; δένδρα fruit- or mast-bearing trees, opp. ὔλη, timber, Th.4.69; δ. ἢμερα καὶ ἄγρια Hdt.8.115; δένδρα tall plants, Id.1.193 (so of rattan, Thphr.HP5.4.7; mustard, Ev.Matt.13.32); αὖον δ. stick, Call.Fr.49.
Liddell, H. G., Scott, R., Jones, H. S., & McKenzie, R. (1996). A Greek-English lexicon (p. 378). Oxford: Clarendon Press.
BrillDAG
δένδρον -ου, τό cf. Goth. triu, AS treow; [see δρῦς] tree, plant (woody), usu. of fruit, cultivated or wild PIND. O. 3.23 HDT. 1.193.3; δ. ἐλάας olive tree ARISTOPH. Av. 617; δένδρεον αὗον dry tree, i.e. staff CALLIM. fr. 260.52 etc. Ion. epic δένδρεον; Aeol. δένδριον later epic δένδρειον | see also δένδρος.
Montanari, F. (2015). M. Goh & C. Schroeder (Eds.), The Brill Dictionary of Ancient Greek. Leiden; Boston: Brill.
BDAG
δένδρον, ου, τό (Hdt.+ [in Hom. δένδρεον]) a relatively large woody plant, tree Mt 21:8; Lk 21:29; Rv 7:1, 3; 8:7; 9:4. Freq. of fruit-bearing varieties, and in contexts pointing to fig. use: Mt 3:10; Lk 3:9 (ELohmeyer, V. Baum u. Frucht: ZST 9, ’32, 377–79); the sound tree and the rotten tree, of good and bad people (Paroem. Gr.: Diogenian. 5, 15 ἐκ τ. καρποῦ τὸ δένδρον) Mt 7:17ff; 12:33 (s. IEph 14:2); Lk 6:43f. Lacking fruit δ. φθινοπωρινὰ ἄκαρπα Jd 12. In a good sense δ. ὡραῖον B 11:10; (εἰς) δ. γίνεσθαι become a tree Lk 13:19; Mt 13:32. ὡς δένδρα ὁρῶ like trees Mk 8:24 (cp. SIG 1168, 121).—Used by Hermas in various figures Hs 2:2; 3:1, 3; 4:1–4; 8, 1, 3f; 8, 2, 7 and 9; 8, 3, 1f; 8, 6, 1; 9, 1, 9f; 9, 27, 1; 9, 28, 1 and 3.—B. 49. DELG s.v. δένδρεον. M-M.
Arndt, W., Danker, F. W., Bauer, W., & Gingrich, F. W. (2000). A Greek-English lexicon of the New Testament and other early Christian literature (3rd ed., p. 217). Chicago: University of Chicago Press.