# 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