Arboretum » Campus Plant Identification – Mead Hall » Mead Hall patio – Pilosocereus azureus, Mammillaria compressa (Mother of hundreds), Thelocactus bicolor (Glory of Texas), Mammillaria mystax, Parodia magnificus Mead Hall patio – Pilosocereus azureus, Mammillaria compressa (Mother of hundreds), Thelocactus bicolor (Glory of Texas), Mammillaria mystax, Parodia magnificus