Potted citrus loaded with small orange fruits

Potted citrus loaded with small orange fruits. Also a large golden Chrysanthemum.

A small banner saying “happy new year” in Vietnamese hanging among small orange fruits

In Hanoi, Vietnam, with the International Palm Society for the Biennial. I’m enjoying seeing magnificent specimens of Citrus x microcarpa, the calamondin, left over from Lunar New Year. (The palms are coming) #IPSinVietnam #Rutaceae

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Ruta chalepensis L. ruda [R. bracteosa DC.] · família: Rutaceae · regió biogeogràfica: mediterrània · forma biològica: camèfit sufruticós · hàbitat: talussos · rang altitudinal: 150 m

Cluster of delicate blue flowers, each with five oval shaped petals

Philotheca nodiflora

A shrub in the family Rutaceae with beautiful, delicate blue flowers. Endemic to Western Australia. Seen in the Stirling Ranges in October.
#ozflora #wildoz #nativeplants #Rutaceae #bloomscrolling

Zanthoxylum macranthum (Chinese: 大花花椒), is a species of woody plants in the family #Rutaceae. It is native to the upland open forests and thickets in south-east #Tibet and southern China, and has been found in #Chongqing (#Nanchuan), #Guizhou, south-west #Henan, western #Hubei, #Hunan.

Picture of oak-like leaves and several pendulous pale white & green flowers

Close up of two pendulous white & green flowers

Chorilaena quercifolia - Karri Oak

Endemic to the Karri forests of south west Western Australia, the leaves of this understorey shrub resemble that of an oak tree… hence the name (Quercus = oak)
#ozflora #wildoz #nativeplants #inaturalist #Rutaceae

Boronia crenulata
Rutaceae
Melton Botanic Gardens
Victoria, Australia
August 2025
#BoroniaCrenulata #Rutaceae #MeltonBotanicGardens #ozplants #ozflora #AustralianFlora #Australiannature #nature #photography #photographyofbluesky #bluesky

#Citrus is a genus of flowering trees and shrubs in the family #Rutaceae. Plants in the genus produce citrus fruits, including important crops such as oranges, mandarins, lemons, grapefruits, pomelos, and limes.

#Citrus is a genus of flowering trees and shrubs in the family #Rutaceae. Plants in the genus produce citrus fruits, including important crops such as oranges, mandarins, lemons, grapefruits, pomelos, and limes.

Close-up photo of a leafy shoot with simple leaves and small, yellow, trimerous flowers. Photo by Scott Zona CC BY-NC 2.0.

A digression on Rutaceae taxonomy: Cneorum is a genus of 2 species of shrubs. One species is from Europe (C. tricoccon, pictured); the other is from the Canary Islands. A third species was described from Cuba but was later determined to be the European species introduced. #Rutaceae #Botany 🌾🧪🌱

Photo of a cultivated shrub with terminal spikes of showy, pink flowers. Photo by Scott Zona CC BY-NC 2.0.

🔥 Keep away from open flame: The foliage of Dictamnus albus, a plant from the Mediterranean region & Asia, has a lemony fragrance. The essential oils volatilize so readily that on a warm, windless evening, you can ignite the oils in the air above the plant.🔥 #Rutaceae #Botany 🌾🧪🌱

Photo of a single, unbranched tree against the sky. POV looking up into the crown. It bears a terminal crown of long, pinnately compound leaves. It looks like a palm.

Subfamily Spathelioideae has just 1 genus, Spathelia, native to the Bahamas, Cuba, Jamaica & Belize. They have palm-like growth habits. Like other Rutaceae, they have distinctive defensive chemistry: Spathelia spp. have alkaloids. 📷: Peter Zika CCBYNC4 #Rutaceae #Botany 🌾🧪🌱

Photo of the end of a leafy shoot bearing a cluster of dozens of small brown follicles that have dried and opened to reveal shiny black seeds. Photo by Scott Zona CC BY-NC 2.0.

A digression on dispersal: Here are some open follicles of Zanthoxylum spinosum. The glossy seeds catch the eyes of birds, who (perhaps) mistake them for juicy, black berries. The birds consume the seeds and then disperse them undigested & unharmed. #dispersal #Rutaceae #Botany 🌾🧪🌱

Close-up photo of Sichuan pepper corns showing the dried, dehiscent follicles. Some black seeds are visible.

Rutaceae phytochemistry: The interesting numbing sensation of Sichuan pepper (Zanthoxylum spp.) is caused by hydroxy-α-sanshool, a fatty acid amide similar in structure to capsaicin from chili pepper. The chemical is found in the fruits (follicles). 📷: Ibán CCBYNCSA2 #Rutaceae #Botany 🌾🧪🌱

Photo of a pink seedless grapefruit sliced in half. A hand holding a knife is cutting into one half.

Certain pharmaceuticals can’t be taken with grapefruit juice. Why? Furanocoumarins in the juice interfere with the gut & liver enzymes that activate/deactivate certain drugs. The interaction can lead to too much or not enough drugs in our system. 📷: Mike CCBYNCSA2 #Citrus #Rutaceae #Botany 🌾🧪🌱

Photo of a plate of sliced lime wedges.

Along with essential oils, limes have furanocoumarins in their rind that cause photodermatitis. When exposed to UV, the chemicals crosslink with the DNA of our skin cells, causing cell death. Occupational hazard of poolside bartenders! 📷: Neil Staeck CCBYNC2 #Citrus #Rutaceae #Botany 🌾🧪🌱

Close-up photo of buds and three open flowers of a Citrus. The flowers are white, with 5 petals, many stamens as described in the post, and conspicuous stigmas. Photo by Scott Zona CC BY-NC 2.0.

The flowers of Rutaceae typically have stamens with thick filaments in a ring around a conspicuous nectar-secreting disc at the base of the ovary and a broad, conspicuous stigma, just what we see in these Citrus × limon 'Meyer' flowers. #Rutaceae #Botany 🌾🧪🌱

Photo of supermarket produce section with lemons, limes, oranges, grapefruits and other citrus displayed for sale. Photo by Scott Zona CC BY-NC 2.0.

Up this week: Rutaceae, a family that includes more than just Citrus (although that genus is especially important economically). Most of the Citrus in our markets are interspecific hybrids that were domesticated in Asia in ancient times. #Rutaceae #Botany 🌾🧪🌱

Choisya ternata is a species of flowering plant in the family #Rutaceae, known as Mexican orange blossom.
#choisyaternata
#Olympus #Zuiko #75mm 1:1.8

Photo of the stem with alternate, pinnately compound leaves. A pair of large, flattened prickles occupies the stipular position. Photo by Scott Zona CC BY-NC 2.0.

These prickles have fooled me. They are in a similar position as stipules, but they’re not stipules. There is no homology. They are just prickles. The Rutaceae are exstipulate (lack stipules) but are plenty prickly. This is Zanthoxylum simulans. #stipule #Rutaceae #Botany 🌾🧪🌱

Diplolaena angustifolia
Rutaceae
Melton Botanic Gardens,
Victoria. Sept 2022

#DiplolaenaAngustifolia #Rutaceae #YanchepRose#MeltonBotanicGardens #ozplants #AustralianFlora #Australiannature #botany

Phebalium woombye
Rutaceae
K'gari,
Queensland,
August 2021
#PhebaliumWoombye #Rutaceae #WallumPhebalium #Queensland #Botany #ozplants #ozflora #AustralianFlora #Australiannature #wildoz #nature #NaturePhotography

#Melicope elleryana blooming on campus! #Rutaceae

Photo of a hand holding a leaf with three obovate leaflets. Photo by Scott Zona CC BY-NC 2.

Leaf vocabulary 4: TERNATE describes a compound leaf of 3 leaflets. It could be interpreted as either a pinnately or palmately compound leaf. We can’t be certain, so we use the word ternate or trifoliolate (NOT trifoliate). 📷: Choisya ternata #Rutaceae #botany 🌾🧪🌱

Melicope rubra
Rutaceae
#MelicopeRubra #Rutaceae #LittleEvodia #CitrusFamily #ozplants #wildoz #ozflora #Australiannature #botany #nature

Stars of the Jarrah forest! #Asterolasia pallida #Rutaceae another stunner of the Australian Citrus family representatives! #WildOz

Pink fireworks produced by #Boronia fastigiata! #Rutaceae #WildOz

#Illustration of the day #Boronia crenulata #Rutaceae

Close-up photo of oranges sliced transversely to show the thick rind and segments.

The fruit of Citrus ( #Rutaceae) is called a hesperidium (as in the golden apples of the Hesperides). A hesperidium is a septate berry (from many carpels) with thick leathery skin. 📷: oranges by David Stewart CC BY 2. #fruit #hesperidium #Botany #PlantScience 🌾🧪

Photo of a pink grapefruit cross-section. A few aborted seeds are visible in the axillary position of each section (locule).

This grapefruit (Citrus × aurantium f. aurantium) is a seedless cultivar, although some undeveloped seeds are present. We can see that the placentation type is axile (i.e., in the axils of the locules). #placentation #Rutaceae : Stefan Van der Straeten CC BY-NC-ND 2 #Botany #PlantScience 🌾🧪