Arachnothryx

Arachnothryx is a genus of flowering plants in the family Rubiaceae. It contains about 107 species. It is found from Mexico to Peru and in Trinidad.

Taxonomy
Arachnothryx was named by Jules Émile Planchon in 1849. This generic name is derived from Ancient Greek: arachne or arachnos, "a spider", and thrix or trichos, "hair".

As currently circumscribed, Arachnothryx is paraphyletic over Cuatrecasasiodendron, Gonzalagunia, and Javorkaea. Some authors have included these genera in a broadly defined Rondeletia, but molecular phylogenetic studies have shown that they are more closely related to Guettarda than to Rondeletia.

Species

 * Arachnothryx aspera (Standl.) Borhidi
 * Arachnothryx atravesadensis (Lorence) Borhidi
 * Arachnothryx bertieroides (Standl.) Borhidi
 * Arachnothryx brachytyrsa Borhidi
 * Arachnothryx brenesii (Standl.) Borhidi
 * Arachnothryx buddleioides (Benth.) Planch.
 * Arachnothryx calycophylla Steyerm.
 * Arachnothryx calycosa (Donn.Sm.) Borhidi
 * Arachnothryx capitellata (Hemsl.) Borhidi
 * Arachnothryx caucana (Standl. ex Steyerm.) Steyerm.
 * Arachnothryx chaconii (Lorence) Borhidi
 * Arachnothryx chiapensis (Brandegee) Borhidi
 * Arachnothryx chimalaparum Lorence ex Borhidi
 * Arachnothryx chimboracensis (Standl.) Steyerm.
 * Arachnothryx chiriquiana (Lorence) Borhidi
 * Arachnothryx colombiana (Rusby) Steyerm.
 * Arachnothryx costanensis Steyerm.
 * Arachnothryx costaricensis (Standl.) Borhidi
 * Arachnothryx cupreiflora (K.Schum. & K.Krause) Steyerm.
 * Arachnothryx darienensis (Standl.) Borhidi
 * Arachnothryx discolor (Kunth) Planch.
 * Arachnothryx dwyeri (Lorence) Borhidi
 * Arachnothryx educta (Standl. ex Steyerm.) Steyerm.
 * Arachnothryx euryphylla (Standl.) Steyerm.
 * Arachnothryx evansii (Lorence) Borhidi
 * Arachnothryx flocculosa Borhidi
 * Arachnothryx fosbergii Steyerm.
 * Arachnothryx galeottii (Standl.) Borhidi
 * Arachnothryx garciae Standl. ex Steyerm.
 * Arachnothryx ginetteae (Lorence) Borhidi
 * Arachnothryx glabrata (Standl.) Steyerm.
 * Arachnothryx gonzaleoides (Standl.) Borhidi
 * Arachnothryx gracilis (Hemsl.) Borhidi
 * Arachnothryx gracilispica (Standl.) Borhidi
 * Arachnothryx guerrerensis (Lorence) Borhidi
 * Arachnothryx guettardioides Standl. ex Steyerm.
 * Arachnothryx heteranthera (Brandegee) Borhidi
 * Arachnothryx hispidula Griseb.
 * Arachnothryx hondurensis (Donn.Sm.) Lorence
 * Arachnothryx izabalensis (Standl. & Steyerm.) Borhidi
 * Arachnothryx jurgensenii (Hemsl.) Borhidi
 * Arachnothryx laniflora (Benth.) Planch.
 * Arachnothryx latiloba Borhidi
 * Arachnothryx leucophylla (Kunth) Planch.
 * Arachnothryx lineolata Borhidi
 * Arachnothryx linguiformis (Hemsl.) Borhidi
 * Arachnothryx linguiloba Borhidi & Diego
 * Arachnothryx lojensis Steyerm.
 * Arachnothryx macrocalyx (Standl. & Steyerm.) Borhidi
 * Arachnothryx manantlanensis (Lorence) Borhidi
 * Arachnothryx megalantha (Lorence) Lorence
 * Arachnothryx mexicana (Turcz.) Borhidi
 * Arachnothryx michoacana Borhidi
 * Arachnothryx monteverdensis (Lorence) Borhidi
 * Arachnothryx monticola Borhidi
 * Arachnothryx myriantha (Standl. & Steyerm.) Borhidi
 * Arachnothryx nebulosa (Standl.) Borhidi
 * Arachnothryx nelsonii Lorence
 * Arachnothryx nitida (Hemsl.) Borhidi
 * Arachnothryx ovandensis (Lundell) Borhidi
 * Arachnothryx ovata (Rusby) Steyerm.
 * Arachnothryx pansamalana (Standl.) Borhidi
 * Arachnothryx pauciflora Borhidi
 * Arachnothryx perezii (Standl. ex Steyerm.) Steyerm.
 * Arachnothryx peruviana (Standl.) Steyerm.
 * Arachnothryx povedae (Lorence) Borhidi
 * Arachnothryx purpurea (Lorence) Borhidi
 * Arachnothryx pyramidalis (Lundell) Borhidi
 * Arachnothryx reflexa (Benth.) Planch.
 * Arachnothryx rekoi (Standl.) Borhidi
 * Arachnothryx ricoae (Lorence) Borhidi
 * Arachnothryx rosea Linden
 * Arachnothryx rubens (L.O.Williams) Borhidi
 * Arachnothryx rufescens (B.L.Rob.) Borhidi
 * Arachnothryx rugulosa (Standl.) Steyerm.
 * Arachnothryx rzedowskii (Lorence) Borhidi
 * Arachnothryx sanchezii Borhidi & Salas-Mor.
 * Arachnothryx scabra (Hemsl.) Borhidi
 * Arachnothryx scoti (Lorence) Borhidi
 * Arachnothryx secunda (Standl.) Borhidi
 * Arachnothryx secundiflora (B.L.Rob.) Borhidi
 * Arachnothryx septicidalis (B.L.Rob.) Borhidi
 * Arachnothryx sessilis Borhidi & G.Ortiz
 * Arachnothryx sinaloae Borhidi
 * Arachnothryx skutchii (Standl. & Steyerm.) Borhidi
 * Arachnothryx sousae Borhidi
 * Arachnothryx spectabilis (Steyerm.) Rova
 * Arachnothryx stachyoidea (Donn.Sm.) Borhidi
 * Arachnothryx subglabra Borhidi & N.C.Jiménez
 * Arachnothryx tacanensis (Lundell) Borhidi
 * Arachnothryx tayloriae (Lorence) Borhidi
 * Arachnothryx tenorioi (Lorence) Borhidi
 * Arachnothryx tenuisepala Borhidi
 * Arachnothryx thiemei (Donn.Sm.) Borhidi
 * Arachnothryx torresii (Standl.) Borhidi
 * Arachnothryx tuxtlensis (Lorence & Cast.-Campos) Borhidi
 * Arachnothryx uxpanapensis (Lorence & Cast.-Campos) Borhidi
 * Arachnothryx venezuelensis Steyerm.
 * Arachnothryx villosa (Hemsl.) Borhidi
 * Arachnothryx wendtii (Lorence & Cast.-Campos) Borhidi